diff --git a/instrumentation-api-incubator/src/main/java/io/opentelemetry/instrumentation/api/incubator/builder/internal/DefaultHttpClientInstrumenterBuilder.java b/instrumentation-api-incubator/src/main/java/io/opentelemetry/instrumentation/api/incubator/builder/internal/DefaultHttpClientInstrumenterBuilder.java
index e74dd2e9f48c..28015cc841a2 100644
--- a/instrumentation-api-incubator/src/main/java/io/opentelemetry/instrumentation/api/incubator/builder/internal/DefaultHttpClientInstrumenterBuilder.java
+++ b/instrumentation-api-incubator/src/main/java/io/opentelemetry/instrumentation/api/incubator/builder/internal/DefaultHttpClientInstrumenterBuilder.java
@@ -50,9 +50,7 @@ public final class DefaultHttpClientInstrumenterBuilder<REQUEST, RESPONSE> {
 
   private final List<AttributesExtractor<? super REQUEST, ? super RESPONSE>> additionalExtractors =
       new ArrayList<>();
-  private Function<
-          SpanStatusExtractor<? super REQUEST, ? super RESPONSE>,
-          ? extends SpanStatusExtractor<? super REQUEST, ? super RESPONSE>>
+  private Function<SpanStatusExtractor<REQUEST, RESPONSE>, SpanStatusExtractor<REQUEST, RESPONSE>>
       statusExtractorTransformer = Function.identity();
   private final HttpClientAttributesExtractorBuilder<REQUEST, RESPONSE>
       httpAttributesExtractorBuilder;
@@ -60,7 +58,7 @@ public final class DefaultHttpClientInstrumenterBuilder<REQUEST, RESPONSE> {
   private final HttpSpanNameExtractorBuilder<REQUEST> httpSpanNameExtractorBuilder;
 
   @Nullable private final TextMapSetter<REQUEST> headerSetter;
-  private Function<SpanNameExtractor<? super REQUEST>, ? extends SpanNameExtractor<? super REQUEST>>
+  private Function<SpanNameExtractor<REQUEST>, ? extends SpanNameExtractor<REQUEST>>
       spanNameExtractorTransformer = Function.identity();
   private boolean emitExperimentalHttpClientMetrics = false;
   private Consumer<InstrumenterBuilder<REQUEST, RESPONSE>> builderCustomizer = b -> {};
@@ -111,9 +109,7 @@ public DefaultHttpClientInstrumenterBuilder<REQUEST, RESPONSE> addAttributesExtr
 
   @CanIgnoreReturnValue
   public DefaultHttpClientInstrumenterBuilder<REQUEST, RESPONSE> setStatusExtractor(
-      Function<
-              SpanStatusExtractor<? super REQUEST, ? super RESPONSE>,
-              ? extends SpanStatusExtractor<? super REQUEST, ? super RESPONSE>>
+      Function<SpanStatusExtractor<REQUEST, RESPONSE>, SpanStatusExtractor<REQUEST, RESPONSE>>
           statusExtractor) {
     this.statusExtractorTransformer = statusExtractor;
     return this;
@@ -180,7 +176,7 @@ public DefaultHttpClientInstrumenterBuilder<REQUEST, RESPONSE> setKnownMethods(
   /** Sets custom {@link SpanNameExtractor} via transform function. */
   @CanIgnoreReturnValue
   public DefaultHttpClientInstrumenterBuilder<REQUEST, RESPONSE> setSpanNameExtractor(
-      Function<SpanNameExtractor<? super REQUEST>, ? extends SpanNameExtractor<? super REQUEST>>
+      Function<SpanNameExtractor<REQUEST>, SpanNameExtractor<REQUEST>>
           spanNameExtractorTransformer) {
     this.spanNameExtractorTransformer = spanNameExtractorTransformer;
     return this;
diff --git a/instrumentation-api-incubator/src/main/java/io/opentelemetry/instrumentation/api/incubator/builder/internal/DefaultHttpServerInstrumenterBuilder.java b/instrumentation-api-incubator/src/main/java/io/opentelemetry/instrumentation/api/incubator/builder/internal/DefaultHttpServerInstrumenterBuilder.java
index caee6c007da7..0353041dac2e 100644
--- a/instrumentation-api-incubator/src/main/java/io/opentelemetry/instrumentation/api/incubator/builder/internal/DefaultHttpServerInstrumenterBuilder.java
+++ b/instrumentation-api-incubator/src/main/java/io/opentelemetry/instrumentation/api/incubator/builder/internal/DefaultHttpServerInstrumenterBuilder.java
@@ -46,16 +46,14 @@ public final class DefaultHttpServerInstrumenterBuilder<REQUEST, RESPONSE> {
 
   private final List<AttributesExtractor<? super REQUEST, ? super RESPONSE>> additionalExtractors =
       new ArrayList<>();
-  private Function<
-          SpanStatusExtractor<? super REQUEST, ? super RESPONSE>,
-          ? extends SpanStatusExtractor<? super REQUEST, ? super RESPONSE>>
+  private Function<SpanStatusExtractor<REQUEST, RESPONSE>, SpanStatusExtractor<REQUEST, RESPONSE>>
       statusExtractorTransformer = Function.identity();
   private final HttpServerAttributesExtractorBuilder<REQUEST, RESPONSE>
       httpAttributesExtractorBuilder;
   private final HttpSpanNameExtractorBuilder<REQUEST> httpSpanNameExtractorBuilder;
 
   @Nullable private final TextMapGetter<REQUEST> headerGetter;
-  private Function<SpanNameExtractor<? super REQUEST>, ? extends SpanNameExtractor<? super REQUEST>>
+  private Function<SpanNameExtractor<REQUEST>, SpanNameExtractor<REQUEST>>
       spanNameExtractorTransformer = Function.identity();
   private final HttpServerRouteBuilder<REQUEST> httpServerRouteBuilder;
   private final HttpServerAttributesGetter<REQUEST, RESPONSE> attributesGetter;
@@ -109,9 +107,7 @@ public DefaultHttpServerInstrumenterBuilder<REQUEST, RESPONSE> addAttributesExtr
 
   @CanIgnoreReturnValue
   public DefaultHttpServerInstrumenterBuilder<REQUEST, RESPONSE> setStatusExtractor(
-      Function<
-              SpanStatusExtractor<? super REQUEST, ? super RESPONSE>,
-              ? extends SpanStatusExtractor<? super REQUEST, ? super RESPONSE>>
+      Function<SpanStatusExtractor<REQUEST, RESPONSE>, SpanStatusExtractor<REQUEST, RESPONSE>>
           statusExtractor) {
     this.statusExtractorTransformer = statusExtractor;
     return this;
@@ -179,7 +175,7 @@ public DefaultHttpServerInstrumenterBuilder<REQUEST, RESPONSE> setKnownMethods(
   /** Sets custom {@link SpanNameExtractor} via transform function. */
   @CanIgnoreReturnValue
   public DefaultHttpServerInstrumenterBuilder<REQUEST, RESPONSE> setSpanNameExtractor(
-      Function<SpanNameExtractor<? super REQUEST>, ? extends SpanNameExtractor<? super REQUEST>>
+      Function<SpanNameExtractor<REQUEST>, SpanNameExtractor<REQUEST>>
           spanNameExtractorTransformer) {
     this.spanNameExtractorTransformer = spanNameExtractorTransformer;
     return this;
diff --git a/instrumentation/apache-httpclient/apache-httpclient-4.3/library/src/main/java/io/opentelemetry/instrumentation/apachehttpclient/v4_3/ApacheHttpClientTelemetryBuilder.java b/instrumentation/apache-httpclient/apache-httpclient-4.3/library/src/main/java/io/opentelemetry/instrumentation/apachehttpclient/v4_3/ApacheHttpClientTelemetryBuilder.java
index d79c6f2cab6f..c7a626a4f75e 100644
--- a/instrumentation/apache-httpclient/apache-httpclient-4.3/library/src/main/java/io/opentelemetry/instrumentation/apachehttpclient/v4_3/ApacheHttpClientTelemetryBuilder.java
+++ b/instrumentation/apache-httpclient/apache-httpclient-4.3/library/src/main/java/io/opentelemetry/instrumentation/apachehttpclient/v4_3/ApacheHttpClientTelemetryBuilder.java
@@ -51,8 +51,7 @@ public ApacheHttpClientTelemetryBuilder addAttributeExtractor(
    */
   @CanIgnoreReturnValue
   public ApacheHttpClientTelemetryBuilder addAttributesExtractor(
-      AttributesExtractor<? super ApacheHttpClientRequest, ? super HttpResponse>
-          attributesExtractor) {
+      AttributesExtractor<ApacheHttpClientRequest, HttpResponse> attributesExtractor) {
     builder.addAttributesExtractor(attributesExtractor);
     return this;
   }
@@ -115,8 +114,8 @@ public ApacheHttpClientTelemetryBuilder setEmitExperimentalHttpClientMetrics(
   @CanIgnoreReturnValue
   public ApacheHttpClientTelemetryBuilder setSpanNameExtractor(
       Function<
-              SpanNameExtractor<? super ApacheHttpClientRequest>,
-              ? extends SpanNameExtractor<? super ApacheHttpClientRequest>>
+              SpanNameExtractor<ApacheHttpClientRequest>,
+              SpanNameExtractor<ApacheHttpClientRequest>>
           spanNameExtractorTransformer) {
     builder.setSpanNameExtractor(spanNameExtractorTransformer);
     return this;
diff --git a/instrumentation/apache-httpclient/apache-httpclient-5.2/library/src/main/java/io/opentelemetry/instrumentation/apachehttpclient/v5_2/ApacheHttpClient5TelemetryBuilder.java b/instrumentation/apache-httpclient/apache-httpclient-5.2/library/src/main/java/io/opentelemetry/instrumentation/apachehttpclient/v5_2/ApacheHttpClient5TelemetryBuilder.java
index 889f24600b91..d340d7a60ae6 100644
--- a/instrumentation/apache-httpclient/apache-httpclient-5.2/library/src/main/java/io/opentelemetry/instrumentation/apachehttpclient/v5_2/ApacheHttpClient5TelemetryBuilder.java
+++ b/instrumentation/apache-httpclient/apache-httpclient-5.2/library/src/main/java/io/opentelemetry/instrumentation/apachehttpclient/v5_2/ApacheHttpClient5TelemetryBuilder.java
@@ -112,8 +112,8 @@ public ApacheHttpClient5TelemetryBuilder setEmitExperimentalHttpClientMetrics(
   @CanIgnoreReturnValue
   public ApacheHttpClient5TelemetryBuilder setSpanNameExtractor(
       Function<
-              SpanNameExtractor<? super ApacheHttpClient5Request>,
-              ? extends SpanNameExtractor<? super ApacheHttpClient5Request>>
+              SpanNameExtractor<ApacheHttpClient5Request>,
+              SpanNameExtractor<ApacheHttpClient5Request>>
           spanNameExtractorTransformer) {
     builder.setSpanNameExtractor(spanNameExtractorTransformer);
     return this;
diff --git a/instrumentation/apache-httpclient/apache-httpclient-5.2/library/src/main/java/io/opentelemetry/instrumentation/apachehttpclient/v5_2/ApacheHttpClientTelemetryBuilder.java b/instrumentation/apache-httpclient/apache-httpclient-5.2/library/src/main/java/io/opentelemetry/instrumentation/apachehttpclient/v5_2/ApacheHttpClientTelemetryBuilder.java
index d0911db28cdd..e6b1f966c337 100644
--- a/instrumentation/apache-httpclient/apache-httpclient-5.2/library/src/main/java/io/opentelemetry/instrumentation/apachehttpclient/v5_2/ApacheHttpClientTelemetryBuilder.java
+++ b/instrumentation/apache-httpclient/apache-httpclient-5.2/library/src/main/java/io/opentelemetry/instrumentation/apachehttpclient/v5_2/ApacheHttpClientTelemetryBuilder.java
@@ -42,8 +42,7 @@ public final class ApacheHttpClientTelemetryBuilder {
    */
   @CanIgnoreReturnValue
   public ApacheHttpClientTelemetryBuilder addAttributesExtractor(
-      AttributesExtractor<? super ApacheHttpClientRequest, ? super HttpResponse>
-          attributesExtractor) {
+      AttributesExtractor<ApacheHttpClientRequest, HttpResponse> attributesExtractor) {
     builder.addAttributesExtractor(attributesExtractor);
     return this;
   }
@@ -93,8 +92,8 @@ public ApacheHttpClientTelemetryBuilder setKnownMethods(Set<String> knownMethods
   @CanIgnoreReturnValue
   public ApacheHttpClientTelemetryBuilder setSpanNameExtractor(
       Function<
-              SpanNameExtractor<? super ApacheHttpClientRequest>,
-              ? extends SpanNameExtractor<? super ApacheHttpClientRequest>>
+              SpanNameExtractor<ApacheHttpClientRequest>,
+              SpanNameExtractor<ApacheHttpClientRequest>>
           spanNameExtractorTransformer) {
     builder.setSpanNameExtractor(spanNameExtractorTransformer);
     return this;
diff --git a/instrumentation/armeria/armeria-1.3/library/src/main/java/io/opentelemetry/instrumentation/armeria/v1_3/ArmeriaClientTelemetryBuilder.java b/instrumentation/armeria/armeria-1.3/library/src/main/java/io/opentelemetry/instrumentation/armeria/v1_3/ArmeriaClientTelemetryBuilder.java
index 7d8cd00b291a..a98b7e928935 100644
--- a/instrumentation/armeria/armeria-1.3/library/src/main/java/io/opentelemetry/instrumentation/armeria/v1_3/ArmeriaClientTelemetryBuilder.java
+++ b/instrumentation/armeria/armeria-1.3/library/src/main/java/io/opentelemetry/instrumentation/armeria/v1_3/ArmeriaClientTelemetryBuilder.java
@@ -41,8 +41,8 @@ public final class ArmeriaClientTelemetryBuilder {
   @CanIgnoreReturnValue
   public ArmeriaClientTelemetryBuilder setStatusExtractor(
       Function<
-              SpanStatusExtractor<? super ClientRequestContext, ? super RequestLog>,
-              ? extends SpanStatusExtractor<? super ClientRequestContext, ? super RequestLog>>
+              SpanStatusExtractor<ClientRequestContext, RequestLog>,
+              SpanStatusExtractor<ClientRequestContext, RequestLog>>
           statusExtractor) {
     builder.setStatusExtractor(statusExtractor);
     return this;
@@ -54,7 +54,7 @@ public ArmeriaClientTelemetryBuilder setStatusExtractor(
    */
   @CanIgnoreReturnValue
   public ArmeriaClientTelemetryBuilder addAttributesExtractor(
-      AttributesExtractor<? super ClientRequestContext, ? super RequestLog> attributesExtractor) {
+      AttributesExtractor<ClientRequestContext, RequestLog> attributesExtractor) {
     builder.addAttributesExtractor(attributesExtractor);
     return this;
   }
@@ -103,9 +103,7 @@ public ArmeriaClientTelemetryBuilder setKnownMethods(Set<String> knownMethods) {
   /** Sets custom client {@link SpanNameExtractor} via transform function. */
   @CanIgnoreReturnValue
   public ArmeriaClientTelemetryBuilder setSpanNameExtractor(
-      Function<
-              SpanNameExtractor<? super ClientRequestContext>,
-              ? extends SpanNameExtractor<? super ClientRequestContext>>
+      Function<SpanNameExtractor<ClientRequestContext>, SpanNameExtractor<ClientRequestContext>>
           clientSpanNameExtractor) {
     builder.setSpanNameExtractor(clientSpanNameExtractor);
     return this;
diff --git a/instrumentation/armeria/armeria-1.3/library/src/main/java/io/opentelemetry/instrumentation/armeria/v1_3/ArmeriaServerTelemetryBuilder.java b/instrumentation/armeria/armeria-1.3/library/src/main/java/io/opentelemetry/instrumentation/armeria/v1_3/ArmeriaServerTelemetryBuilder.java
index 613898bdad9a..8526c27f1bb3 100644
--- a/instrumentation/armeria/armeria-1.3/library/src/main/java/io/opentelemetry/instrumentation/armeria/v1_3/ArmeriaServerTelemetryBuilder.java
+++ b/instrumentation/armeria/armeria-1.3/library/src/main/java/io/opentelemetry/instrumentation/armeria/v1_3/ArmeriaServerTelemetryBuilder.java
@@ -39,8 +39,8 @@ public final class ArmeriaServerTelemetryBuilder {
   @CanIgnoreReturnValue
   public ArmeriaServerTelemetryBuilder setStatusExtractor(
       Function<
-              SpanStatusExtractor<? super ServiceRequestContext, ? super RequestLog>,
-              ? extends SpanStatusExtractor<? super ServiceRequestContext, ? super RequestLog>>
+              SpanStatusExtractor<ServiceRequestContext, RequestLog>,
+              SpanStatusExtractor<ServiceRequestContext, RequestLog>>
           statusExtractor) {
     builder.setStatusExtractor(statusExtractor);
     return this;
@@ -52,7 +52,7 @@ public ArmeriaServerTelemetryBuilder setStatusExtractor(
    */
   @CanIgnoreReturnValue
   public ArmeriaServerTelemetryBuilder addAttributesExtractor(
-      AttributesExtractor<? super ServiceRequestContext, ? super RequestLog> attributesExtractor) {
+      AttributesExtractor<ServiceRequestContext, RequestLog> attributesExtractor) {
     builder.addAttributesExtractor(attributesExtractor);
     return this;
   }
@@ -101,9 +101,7 @@ public ArmeriaServerTelemetryBuilder setKnownMethods(Set<String> knownMethods) {
   /** Sets custom server {@link SpanNameExtractor} via transform function. */
   @CanIgnoreReturnValue
   public ArmeriaServerTelemetryBuilder setSpanNameExtractor(
-      Function<
-              SpanNameExtractor<? super ServiceRequestContext>,
-              ? extends SpanNameExtractor<? super ServiceRequestContext>>
+      Function<SpanNameExtractor<ServiceRequestContext>, SpanNameExtractor<ServiceRequestContext>>
           serverSpanNameExtractor) {
     builder.setSpanNameExtractor(serverSpanNameExtractor);
     return this;
diff --git a/instrumentation/armeria/armeria-1.3/library/src/main/java/io/opentelemetry/instrumentation/armeria/v1_3/ArmeriaTelemetryBuilder.java b/instrumentation/armeria/armeria-1.3/library/src/main/java/io/opentelemetry/instrumentation/armeria/v1_3/ArmeriaTelemetryBuilder.java
index 5a900eb95c8c..1f424edbe7cf 100644
--- a/instrumentation/armeria/armeria-1.3/library/src/main/java/io/opentelemetry/instrumentation/armeria/v1_3/ArmeriaTelemetryBuilder.java
+++ b/instrumentation/armeria/armeria-1.3/library/src/main/java/io/opentelemetry/instrumentation/armeria/v1_3/ArmeriaTelemetryBuilder.java
@@ -69,8 +69,8 @@ public ArmeriaTelemetryBuilder setStatusExtractor(
   @CanIgnoreReturnValue
   public ArmeriaTelemetryBuilder setClientStatusExtractor(
       Function<
-              SpanStatusExtractor<? super ClientRequestContext, ? super RequestLog>,
-              ? extends SpanStatusExtractor<? super ClientRequestContext, ? super RequestLog>>
+              SpanStatusExtractor<ClientRequestContext, RequestLog>,
+              SpanStatusExtractor<ClientRequestContext, RequestLog>>
           statusExtractor) {
     clientBuilder.setStatusExtractor(statusExtractor);
     return this;
@@ -85,8 +85,8 @@ public ArmeriaTelemetryBuilder setClientStatusExtractor(
   @CanIgnoreReturnValue
   public ArmeriaTelemetryBuilder setServerStatusExtractor(
       Function<
-              SpanStatusExtractor<? super ServiceRequestContext, ? super RequestLog>,
-              ? extends SpanStatusExtractor<? super ServiceRequestContext, ? super RequestLog>>
+              SpanStatusExtractor<ServiceRequestContext, RequestLog>,
+              SpanStatusExtractor<ServiceRequestContext, RequestLog>>
           statusExtractor) {
     serverBuilder.setStatusExtractor(statusExtractor);
     return this;
@@ -270,9 +270,7 @@ public ArmeriaTelemetryBuilder setEmitExperimentalHttpServerMetrics(
   @Deprecated
   @CanIgnoreReturnValue
   public ArmeriaTelemetryBuilder setClientSpanNameExtractor(
-      Function<
-              SpanNameExtractor<? super ClientRequestContext>,
-              ? extends SpanNameExtractor<? super ClientRequestContext>>
+      Function<SpanNameExtractor<ClientRequestContext>, SpanNameExtractor<ClientRequestContext>>
           clientSpanNameExtractor) {
     clientBuilder.setSpanNameExtractor(clientSpanNameExtractor);
     return this;
@@ -286,9 +284,7 @@ public ArmeriaTelemetryBuilder setClientSpanNameExtractor(
   @Deprecated
   @CanIgnoreReturnValue
   public ArmeriaTelemetryBuilder setServerSpanNameExtractor(
-      Function<
-              SpanNameExtractor<? super ServiceRequestContext>,
-              ? extends SpanNameExtractor<? super ServiceRequestContext>>
+      Function<SpanNameExtractor<ServiceRequestContext>, SpanNameExtractor<ServiceRequestContext>>
           serverSpanNameExtractor) {
     serverBuilder.setSpanNameExtractor(serverSpanNameExtractor);
     return this;
diff --git a/instrumentation/java-http-client/library/src/main/java/io/opentelemetry/instrumentation/httpclient/JavaHttpClientTelemetryBuilder.java b/instrumentation/java-http-client/library/src/main/java/io/opentelemetry/instrumentation/httpclient/JavaHttpClientTelemetryBuilder.java
index 99c823609619..f9bee09c3e1c 100644
--- a/instrumentation/java-http-client/library/src/main/java/io/opentelemetry/instrumentation/httpclient/JavaHttpClientTelemetryBuilder.java
+++ b/instrumentation/java-http-client/library/src/main/java/io/opentelemetry/instrumentation/httpclient/JavaHttpClientTelemetryBuilder.java
@@ -49,7 +49,7 @@ public JavaHttpClientTelemetryBuilder addAttributeExtractor(
    */
   @CanIgnoreReturnValue
   public JavaHttpClientTelemetryBuilder addAttributesExtractor(
-      AttributesExtractor<? super HttpRequest, ? super HttpResponse<?>> attributesExtractor) {
+      AttributesExtractor<HttpRequest, HttpResponse<?>> attributesExtractor) {
     builder.addAttributesExtractor(attributesExtractor);
     return this;
   }
@@ -111,9 +111,7 @@ public JavaHttpClientTelemetryBuilder setEmitExperimentalHttpClientMetrics(
   /** Sets custom {@link SpanNameExtractor} via transform function. */
   @CanIgnoreReturnValue
   public JavaHttpClientTelemetryBuilder setSpanNameExtractor(
-      Function<
-              SpanNameExtractor<? super HttpRequest>,
-              ? extends SpanNameExtractor<? super HttpRequest>>
+      Function<SpanNameExtractor<HttpRequest>, SpanNameExtractor<HttpRequest>>
           spanNameExtractorTransformer) {
     builder.setSpanNameExtractor(spanNameExtractorTransformer);
     return this;
diff --git a/instrumentation/jetty-httpclient/jetty-httpclient-12.0/library/src/main/java/io/opentelemetry/instrumentation/jetty/httpclient/v12_0/JettyClientTelemetryBuilder.java b/instrumentation/jetty-httpclient/jetty-httpclient-12.0/library/src/main/java/io/opentelemetry/instrumentation/jetty/httpclient/v12_0/JettyClientTelemetryBuilder.java
index aa137d18baf1..25efd2300a15 100644
--- a/instrumentation/jetty-httpclient/jetty-httpclient-12.0/library/src/main/java/io/opentelemetry/instrumentation/jetty/httpclient/v12_0/JettyClientTelemetryBuilder.java
+++ b/instrumentation/jetty-httpclient/jetty-httpclient-12.0/library/src/main/java/io/opentelemetry/instrumentation/jetty/httpclient/v12_0/JettyClientTelemetryBuilder.java
@@ -64,7 +64,7 @@ public JettyClientTelemetryBuilder addAttributeExtractor(
    */
   @CanIgnoreReturnValue
   public JettyClientTelemetryBuilder addAttributesExtractor(
-      AttributesExtractor<? super Request, ? super Response> attributesExtractor) {
+      AttributesExtractor<Request, Response> attributesExtractor) {
     builder.addAttributesExtractor(attributesExtractor);
     return this;
   }
@@ -126,7 +126,7 @@ public JettyClientTelemetryBuilder setEmitExperimentalHttpClientMetrics(
   /** Sets custom {@link SpanNameExtractor} via transform function. */
   @CanIgnoreReturnValue
   public JettyClientTelemetryBuilder setSpanNameExtractor(
-      Function<SpanNameExtractor<? super Request>, ? extends SpanNameExtractor<? super Request>>
+      Function<SpanNameExtractor<Request>, SpanNameExtractor<Request>>
           spanNameExtractorTransformer) {
     builder.setSpanNameExtractor(spanNameExtractorTransformer);
     return this;
diff --git a/instrumentation/jetty-httpclient/jetty-httpclient-9.2/library/src/main/java/io/opentelemetry/instrumentation/jetty/httpclient/v9_2/JettyClientTelemetryBuilder.java b/instrumentation/jetty-httpclient/jetty-httpclient-9.2/library/src/main/java/io/opentelemetry/instrumentation/jetty/httpclient/v9_2/JettyClientTelemetryBuilder.java
index c414967a315a..5585a32efcc0 100644
--- a/instrumentation/jetty-httpclient/jetty-httpclient-9.2/library/src/main/java/io/opentelemetry/instrumentation/jetty/httpclient/v9_2/JettyClientTelemetryBuilder.java
+++ b/instrumentation/jetty-httpclient/jetty-httpclient-9.2/library/src/main/java/io/opentelemetry/instrumentation/jetty/httpclient/v9_2/JettyClientTelemetryBuilder.java
@@ -64,7 +64,7 @@ public JettyClientTelemetryBuilder addAttributeExtractor(
    */
   @CanIgnoreReturnValue
   public JettyClientTelemetryBuilder addAttributesExtractor(
-      AttributesExtractor<? super Request, ? super Response> attributesExtractor) {
+      AttributesExtractor<Request, Response> attributesExtractor) {
     builder.addAttributesExtractor(attributesExtractor);
     return this;
   }
@@ -126,7 +126,7 @@ public JettyClientTelemetryBuilder setEmitExperimentalHttpClientMetrics(
   /** Sets custom {@link SpanNameExtractor} via transform function. */
   @CanIgnoreReturnValue
   public JettyClientTelemetryBuilder setSpanNameExtractor(
-      Function<SpanNameExtractor<? super Request>, ? extends SpanNameExtractor<? super Request>>
+      Function<SpanNameExtractor<Request>, SpanNameExtractor<Request>>
           spanNameExtractorTransformer) {
     builder.setSpanNameExtractor(spanNameExtractorTransformer);
     return this;
diff --git a/instrumentation/ktor/ktor-1.0/library/src/main/kotlin/io/opentelemetry/instrumentation/ktor/v1_0/KtorServerTelemetry.kt b/instrumentation/ktor/ktor-1.0/library/src/main/kotlin/io/opentelemetry/instrumentation/ktor/v1_0/KtorServerTelemetry.kt
index d4635e557962..938e0e1ce198 100644
--- a/instrumentation/ktor/ktor-1.0/library/src/main/kotlin/io/opentelemetry/instrumentation/ktor/v1_0/KtorServerTelemetry.kt
+++ b/instrumentation/ktor/ktor-1.0/library/src/main/kotlin/io/opentelemetry/instrumentation/ktor/v1_0/KtorServerTelemetry.kt
@@ -45,7 +45,7 @@ class KtorServerTelemetry private constructor(
     }
 
     fun setStatusExtractor(
-      extractor: (SpanStatusExtractor<in ApplicationRequest, in ApplicationResponse>) -> SpanStatusExtractor<in ApplicationRequest, in ApplicationResponse>
+      extractor: (SpanStatusExtractor<ApplicationRequest, ApplicationResponse>) -> SpanStatusExtractor<ApplicationRequest, ApplicationResponse>
     ) {
       builder.setStatusExtractor { prevExtractor ->
         SpanStatusExtractor { spanStatusBuilder: SpanStatusBuilder,
@@ -61,7 +61,7 @@ class KtorServerTelemetry private constructor(
       this.spanKindExtractor = extractor
     }
 
-    fun addAttributesExtractor(extractor: AttributesExtractor<in ApplicationRequest, in ApplicationResponse>) {
+    fun addAttributesExtractor(extractor: AttributesExtractor<ApplicationRequest, ApplicationResponse>) {
       builder.addAttributesExtractor(extractor)
     }
 
diff --git a/instrumentation/ktor/ktor-1.0/library/src/main/kotlin/io/opentelemetry/instrumentation/ktor/v1_0/KtorServerTracing.kt b/instrumentation/ktor/ktor-1.0/library/src/main/kotlin/io/opentelemetry/instrumentation/ktor/v1_0/KtorServerTracing.kt
index 1073053d0639..0dd1023173c0 100644
--- a/instrumentation/ktor/ktor-1.0/library/src/main/kotlin/io/opentelemetry/instrumentation/ktor/v1_0/KtorServerTracing.kt
+++ b/instrumentation/ktor/ktor-1.0/library/src/main/kotlin/io/opentelemetry/instrumentation/ktor/v1_0/KtorServerTracing.kt
@@ -46,7 +46,7 @@ class KtorServerTracing private constructor(
     }
 
     fun setStatusExtractor(
-      extractor: (SpanStatusExtractor<in ApplicationRequest, in ApplicationResponse>) -> SpanStatusExtractor<in ApplicationRequest, in ApplicationResponse>
+      extractor: (SpanStatusExtractor<ApplicationRequest, ApplicationResponse>) -> SpanStatusExtractor<ApplicationRequest, in ApplicationResponse>
     ) {
       builder.setStatusExtractor { prevExtractor ->
         SpanStatusExtractor { spanStatusBuilder: SpanStatusBuilder,
@@ -62,7 +62,7 @@ class KtorServerTracing private constructor(
       this.spanKindExtractor = extractor
     }
 
-    fun addAttributeExtractor(extractor: AttributesExtractor<in ApplicationRequest, in ApplicationResponse>) {
+    fun addAttributeExtractor(extractor: AttributesExtractor<ApplicationRequest, ApplicationResponse>) {
       builder.addAttributesExtractor(extractor)
     }
 
diff --git a/instrumentation/ktor/ktor-2-common/library/src/main/kotlin/io/opentelemetry/instrumentation/ktor/v2_0/common/AbstractKtorClientTelemetryBuilder.kt b/instrumentation/ktor/ktor-2-common/library/src/main/kotlin/io/opentelemetry/instrumentation/ktor/v2_0/common/AbstractKtorClientTelemetryBuilder.kt
index f07d5c6764ed..4afdaa51a1f3 100644
--- a/instrumentation/ktor/ktor-2-common/library/src/main/kotlin/io/opentelemetry/instrumentation/ktor/v2_0/common/AbstractKtorClientTelemetryBuilder.kt
+++ b/instrumentation/ktor/ktor-2-common/library/src/main/kotlin/io/opentelemetry/instrumentation/ktor/v2_0/common/AbstractKtorClientTelemetryBuilder.kt
@@ -82,7 +82,7 @@ abstract class AbstractKtorClientTelemetryBuilder(
     })
   }
 
-  fun spanNameExtractor(spanNameExtractorTransformer: Function<SpanNameExtractor<in HttpRequestData>, out SpanNameExtractor<in HttpRequestData>>) {
+  fun spanNameExtractor(spanNameExtractorTransformer: Function<SpanNameExtractor<HttpRequestData>, SpanNameExtractor<HttpRequestData>>) {
     builder.setSpanNameExtractor(spanNameExtractorTransformer)
   }
 
diff --git a/instrumentation/ktor/ktor-2-common/library/src/main/kotlin/io/opentelemetry/instrumentation/ktor/v2_0/common/AbstractKtorServerTelemetryBuilder.kt b/instrumentation/ktor/ktor-2-common/library/src/main/kotlin/io/opentelemetry/instrumentation/ktor/v2_0/common/AbstractKtorServerTelemetryBuilder.kt
index 2e042bea3fb6..0f322816b18b 100644
--- a/instrumentation/ktor/ktor-2-common/library/src/main/kotlin/io/opentelemetry/instrumentation/ktor/v2_0/common/AbstractKtorServerTelemetryBuilder.kt
+++ b/instrumentation/ktor/ktor-2-common/library/src/main/kotlin/io/opentelemetry/instrumentation/ktor/v2_0/common/AbstractKtorServerTelemetryBuilder.kt
@@ -42,7 +42,7 @@ abstract class AbstractKtorServerTelemetryBuilder(private val instrumentationNam
       )
   }
 
-  fun spanStatusExtractor(extract: SpanStatusData.(SpanStatusExtractor<in ApplicationRequest, in ApplicationResponse>) -> Unit) {
+  fun spanStatusExtractor(extract: SpanStatusData.(SpanStatusExtractor<ApplicationRequest, ApplicationResponse>) -> Unit) {
     builder.setStatusExtractor { prevExtractor ->
       SpanStatusExtractor { spanStatusBuilder: SpanStatusBuilder,
                             request: ApplicationRequest,
@@ -86,7 +86,7 @@ abstract class AbstractKtorServerTelemetryBuilder(private val instrumentationNam
     )
   }
 
-  fun spanNameExtractor(spanNameExtractorTransformer: Function<SpanNameExtractor<in ApplicationRequest>, out SpanNameExtractor<in ApplicationRequest>>) {
+  fun spanNameExtractor(spanNameExtractorTransformer: Function<SpanNameExtractor<ApplicationRequest>, SpanNameExtractor<ApplicationRequest>>) {
     builder.setSpanNameExtractor(spanNameExtractorTransformer)
   }
 
diff --git a/instrumentation/ktor/ktor-2-common/library/src/main/kotlin/io/opentelemetry/instrumentation/ktor/v2_0/common/client/AbstractKtorClientTracingBuilder.kt b/instrumentation/ktor/ktor-2-common/library/src/main/kotlin/io/opentelemetry/instrumentation/ktor/v2_0/common/client/AbstractKtorClientTracingBuilder.kt
index 12bff4795102..44fd8fe8fd6c 100644
--- a/instrumentation/ktor/ktor-2-common/library/src/main/kotlin/io/opentelemetry/instrumentation/ktor/v2_0/common/client/AbstractKtorClientTracingBuilder.kt
+++ b/instrumentation/ktor/ktor-2-common/library/src/main/kotlin/io/opentelemetry/instrumentation/ktor/v2_0/common/client/AbstractKtorClientTracingBuilder.kt
@@ -98,10 +98,10 @@ abstract class AbstractKtorClientTracingBuilder(
   }
 
   @Deprecated("Please use method `attributeExtractor`")
-  fun addAttributesExtractors(vararg extractors: AttributesExtractor<in HttpRequestData, in HttpResponse>) = addAttributesExtractors(extractors.asList())
+  fun addAttributesExtractors(vararg extractors: AttributesExtractor<HttpRequestData, HttpResponse>) = addAttributesExtractors(extractors.asList())
 
   @Deprecated("Please use method `attributeExtractor`")
-  fun addAttributesExtractors(extractors: Iterable<AttributesExtractor<in HttpRequestData, in HttpResponse>>) {
+  fun addAttributesExtractors(extractors: Iterable<AttributesExtractor<HttpRequestData, HttpResponse>>) {
     extractors.forEach {
       attributeExtractor {
         onStart { it.onStart(attributes, parentContext, request) }
@@ -175,7 +175,7 @@ abstract class AbstractKtorClientTracingBuilder(
     clientBuilder.setEmitExperimentalHttpClientMetrics(true)
   }
 
-  fun spanNameExtractor(spanNameExtractorTransformer: Function<SpanNameExtractor<in HttpRequestData>, out SpanNameExtractor<in HttpRequestData>>) {
+  fun spanNameExtractor(spanNameExtractorTransformer: Function<SpanNameExtractor<HttpRequestData>, SpanNameExtractor<HttpRequestData>>) {
     clientBuilder.setSpanNameExtractor(spanNameExtractorTransformer)
   }
 }
diff --git a/instrumentation/ktor/ktor-2-common/library/src/main/kotlin/io/opentelemetry/instrumentation/ktor/v2_0/common/server/AbstractKtorServerTracingBuilder.kt b/instrumentation/ktor/ktor-2-common/library/src/main/kotlin/io/opentelemetry/instrumentation/ktor/v2_0/common/server/AbstractKtorServerTracingBuilder.kt
index 8064f208a29b..7869938ab160 100644
--- a/instrumentation/ktor/ktor-2-common/library/src/main/kotlin/io/opentelemetry/instrumentation/ktor/v2_0/common/server/AbstractKtorServerTracingBuilder.kt
+++ b/instrumentation/ktor/ktor-2-common/library/src/main/kotlin/io/opentelemetry/instrumentation/ktor/v2_0/common/server/AbstractKtorServerTracingBuilder.kt
@@ -46,14 +46,14 @@ abstract class AbstractKtorServerTracingBuilder(private val instrumentationName:
 
   @Deprecated("Please use method `spanStatusExtractor`")
   fun setStatusExtractor(
-    extractor: (SpanStatusExtractor<in ApplicationRequest, in ApplicationResponse>) -> SpanStatusExtractor<in ApplicationRequest, in ApplicationResponse>
+    extractor: (SpanStatusExtractor<ApplicationRequest, ApplicationResponse>) -> SpanStatusExtractor<ApplicationRequest, ApplicationResponse>
   ) {
     spanStatusExtractor { prevStatusExtractor ->
       extractor(prevStatusExtractor).extract(spanStatusBuilder, request, response, error)
     }
   }
 
-  fun spanStatusExtractor(extract: SpanStatusData.(SpanStatusExtractor<in ApplicationRequest, in ApplicationResponse>) -> Unit) {
+  fun spanStatusExtractor(extract: SpanStatusData.(SpanStatusExtractor<ApplicationRequest, ApplicationResponse>) -> Unit) {
     serverBuilder.setStatusExtractor { prevExtractor ->
       SpanStatusExtractor { spanStatusBuilder: SpanStatusBuilder,
                             request: ApplicationRequest,
@@ -89,12 +89,12 @@ abstract class AbstractKtorServerTracingBuilder(private val instrumentationName:
     }
   }
 
-  fun spanNameExtractor(spanNameExtractorTransformer: Function<SpanNameExtractor<in ApplicationRequest>, out SpanNameExtractor<in ApplicationRequest>>) {
+  fun spanNameExtractor(spanNameExtractorTransformer: Function<SpanNameExtractor<ApplicationRequest>, SpanNameExtractor<ApplicationRequest>>) {
     serverBuilder.setSpanNameExtractor(spanNameExtractorTransformer)
   }
 
   @Deprecated("Please use method `attributeExtractor`")
-  fun addAttributeExtractor(extractor: AttributesExtractor<in ApplicationRequest, in ApplicationResponse>) {
+  fun addAttributeExtractor(extractor: AttributesExtractor<ApplicationRequest, ApplicationResponse>) {
     attributeExtractor {
       onStart {
         extractor.onStart(attributes, parentContext, request)
diff --git a/instrumentation/netty/netty-4.1/library/src/main/java/io/opentelemetry/instrumentation/netty/v4_1/NettyClientTelemetryBuilder.java b/instrumentation/netty/netty-4.1/library/src/main/java/io/opentelemetry/instrumentation/netty/v4_1/NettyClientTelemetryBuilder.java
index d43c09ee4431..54f586406b92 100644
--- a/instrumentation/netty/netty-4.1/library/src/main/java/io/opentelemetry/instrumentation/netty/v4_1/NettyClientTelemetryBuilder.java
+++ b/instrumentation/netty/netty-4.1/library/src/main/java/io/opentelemetry/instrumentation/netty/v4_1/NettyClientTelemetryBuilder.java
@@ -108,9 +108,7 @@ public NettyClientTelemetryBuilder setEmitExperimentalHttpClientMetrics(
   /** Sets custom {@link SpanNameExtractor} via transform function. */
   @CanIgnoreReturnValue
   public NettyClientTelemetryBuilder setSpanNameExtractor(
-      Function<
-              SpanNameExtractor<? super HttpRequestAndChannel>,
-              ? extends SpanNameExtractor<? super HttpRequestAndChannel>>
+      Function<SpanNameExtractor<HttpRequestAndChannel>, SpanNameExtractor<HttpRequestAndChannel>>
           spanNameExtractorTransformer) {
     builder.setSpanNameExtractor(spanNameExtractorTransformer);
     return this;
diff --git a/instrumentation/okhttp/okhttp-3.0/library/src/main/java/io/opentelemetry/instrumentation/okhttp/v3_0/OkHttpTelemetryBuilder.java b/instrumentation/okhttp/okhttp-3.0/library/src/main/java/io/opentelemetry/instrumentation/okhttp/v3_0/OkHttpTelemetryBuilder.java
index a6f642c346d0..498a36761e8c 100644
--- a/instrumentation/okhttp/okhttp-3.0/library/src/main/java/io/opentelemetry/instrumentation/okhttp/v3_0/OkHttpTelemetryBuilder.java
+++ b/instrumentation/okhttp/okhttp-3.0/library/src/main/java/io/opentelemetry/instrumentation/okhttp/v3_0/OkHttpTelemetryBuilder.java
@@ -49,7 +49,7 @@ public OkHttpTelemetryBuilder addAttributeExtractor(
    */
   @CanIgnoreReturnValue
   public OkHttpTelemetryBuilder addAttributesExtractor(
-      AttributesExtractor<? super Interceptor.Chain, ? super Response> attributesExtractor) {
+      AttributesExtractor<Interceptor.Chain, Response> attributesExtractor) {
     builder.addAttributesExtractor(attributesExtractor);
     return this;
   }
@@ -111,9 +111,7 @@ public OkHttpTelemetryBuilder setEmitExperimentalHttpClientMetrics(
   /** Sets custom {@link SpanNameExtractor} via transform function. */
   @CanIgnoreReturnValue
   public OkHttpTelemetryBuilder setSpanNameExtractor(
-      Function<
-              SpanNameExtractor<? super Interceptor.Chain>,
-              ? extends SpanNameExtractor<? super Interceptor.Chain>>
+      Function<SpanNameExtractor<Interceptor.Chain>, SpanNameExtractor<Interceptor.Chain>>
           spanNameExtractorTransformer) {
     builder.setSpanNameExtractor(spanNameExtractorTransformer);
     return this;
diff --git a/instrumentation/ratpack/ratpack-1.7/library/src/main/java/io/opentelemetry/instrumentation/ratpack/v1_7/RatpackClientTelemetryBuilder.java b/instrumentation/ratpack/ratpack-1.7/library/src/main/java/io/opentelemetry/instrumentation/ratpack/v1_7/RatpackClientTelemetryBuilder.java
index f2f077b76fa0..d14fec110e6c 100644
--- a/instrumentation/ratpack/ratpack-1.7/library/src/main/java/io/opentelemetry/instrumentation/ratpack/v1_7/RatpackClientTelemetryBuilder.java
+++ b/instrumentation/ratpack/ratpack-1.7/library/src/main/java/io/opentelemetry/instrumentation/ratpack/v1_7/RatpackClientTelemetryBuilder.java
@@ -37,7 +37,7 @@ public final class RatpackClientTelemetryBuilder {
 
   @CanIgnoreReturnValue
   public RatpackClientTelemetryBuilder addAttributesExtractor(
-      AttributesExtractor<? super RequestSpec, ? super HttpResponse> attributesExtractor) {
+      AttributesExtractor<RequestSpec, HttpResponse> attributesExtractor) {
     builder.addAttributesExtractor(attributesExtractor);
     return this;
   }
@@ -86,9 +86,7 @@ public RatpackClientTelemetryBuilder setKnownMethods(Set<String> knownMethods) {
   /** Sets custom client {@link SpanNameExtractor} via transform function. */
   @CanIgnoreReturnValue
   public RatpackClientTelemetryBuilder setSpanNameExtractor(
-      Function<
-              SpanNameExtractor<? super RequestSpec>,
-              ? extends SpanNameExtractor<? super RequestSpec>>
+      Function<SpanNameExtractor<RequestSpec>, SpanNameExtractor<RequestSpec>>
           clientSpanNameExtractor) {
     builder.setSpanNameExtractor(clientSpanNameExtractor);
     return this;
diff --git a/instrumentation/ratpack/ratpack-1.7/library/src/main/java/io/opentelemetry/instrumentation/ratpack/v1_7/RatpackServerTelemetryBuilder.java b/instrumentation/ratpack/ratpack-1.7/library/src/main/java/io/opentelemetry/instrumentation/ratpack/v1_7/RatpackServerTelemetryBuilder.java
index 20cc6201af0b..80d2dde8eb74 100644
--- a/instrumentation/ratpack/ratpack-1.7/library/src/main/java/io/opentelemetry/instrumentation/ratpack/v1_7/RatpackServerTelemetryBuilder.java
+++ b/instrumentation/ratpack/ratpack-1.7/library/src/main/java/io/opentelemetry/instrumentation/ratpack/v1_7/RatpackServerTelemetryBuilder.java
@@ -41,7 +41,7 @@ public final class RatpackServerTelemetryBuilder {
    */
   @CanIgnoreReturnValue
   public RatpackServerTelemetryBuilder addAttributesExtractor(
-      AttributesExtractor<? super Request, ? super Response> attributesExtractor) {
+      AttributesExtractor<Request, Response> attributesExtractor) {
     builder.addAttributesExtractor(attributesExtractor);
     return this;
   }
@@ -90,8 +90,7 @@ public RatpackServerTelemetryBuilder setKnownMethods(Set<String> knownMethods) {
   /** Sets custom server {@link SpanNameExtractor} via transform function. */
   @CanIgnoreReturnValue
   public RatpackServerTelemetryBuilder setSpanNameExtractor(
-      Function<SpanNameExtractor<? super Request>, ? extends SpanNameExtractor<? super Request>>
-          serverSpanNameExtractor) {
+      Function<SpanNameExtractor<Request>, SpanNameExtractor<Request>> serverSpanNameExtractor) {
     builder.setSpanNameExtractor(serverSpanNameExtractor);
     return this;
   }
diff --git a/instrumentation/ratpack/ratpack-1.7/library/src/main/java/io/opentelemetry/instrumentation/ratpack/v1_7/RatpackTelemetryBuilder.java b/instrumentation/ratpack/ratpack-1.7/library/src/main/java/io/opentelemetry/instrumentation/ratpack/v1_7/RatpackTelemetryBuilder.java
index 47f8aa063643..643b386b3846 100644
--- a/instrumentation/ratpack/ratpack-1.7/library/src/main/java/io/opentelemetry/instrumentation/ratpack/v1_7/RatpackTelemetryBuilder.java
+++ b/instrumentation/ratpack/ratpack-1.7/library/src/main/java/io/opentelemetry/instrumentation/ratpack/v1_7/RatpackTelemetryBuilder.java
@@ -188,9 +188,7 @@ public RatpackTelemetryBuilder setEmitExperimentalHttpServerMetrics(
   @Deprecated
   @CanIgnoreReturnValue
   public RatpackTelemetryBuilder setClientSpanNameExtractor(
-      Function<
-              SpanNameExtractor<? super RequestSpec>,
-              ? extends SpanNameExtractor<? super RequestSpec>>
+      Function<SpanNameExtractor<RequestSpec>, SpanNameExtractor<RequestSpec>>
           clientSpanNameExtractor) {
     clientBuilder.setSpanNameExtractor(clientSpanNameExtractor);
     return this;
@@ -204,8 +202,7 @@ public RatpackTelemetryBuilder setClientSpanNameExtractor(
   @Deprecated
   @CanIgnoreReturnValue
   public RatpackTelemetryBuilder setServerSpanNameExtractor(
-      Function<SpanNameExtractor<? super Request>, ? extends SpanNameExtractor<? super Request>>
-          serverSpanNameExtractor) {
+      Function<SpanNameExtractor<Request>, SpanNameExtractor<Request>> serverSpanNameExtractor) {
     serverBuilder.setSpanNameExtractor(serverSpanNameExtractor);
     return this;
   }
diff --git a/instrumentation/restlet/restlet-1.1/library/src/main/java/io/opentelemetry/instrumentation/restlet/v1_1/RestletTelemetryBuilder.java b/instrumentation/restlet/restlet-1.1/library/src/main/java/io/opentelemetry/instrumentation/restlet/v1_1/RestletTelemetryBuilder.java
index 3ff61af4a73f..84b618e2d956 100644
--- a/instrumentation/restlet/restlet-1.1/library/src/main/java/io/opentelemetry/instrumentation/restlet/v1_1/RestletTelemetryBuilder.java
+++ b/instrumentation/restlet/restlet-1.1/library/src/main/java/io/opentelemetry/instrumentation/restlet/v1_1/RestletTelemetryBuilder.java
@@ -95,7 +95,7 @@ public RestletTelemetryBuilder setEmitExperimentalHttpServerMetrics(
   /** Sets custom {@link SpanNameExtractor} via transform function. */
   @CanIgnoreReturnValue
   public RestletTelemetryBuilder setSpanNameExtractor(
-      Function<SpanNameExtractor<? super Request>, ? extends SpanNameExtractor<? super Request>>
+      Function<SpanNameExtractor<Request>, SpanNameExtractor<Request>>
           spanNameExtractorTransformer) {
     builder.setSpanNameExtractor(spanNameExtractorTransformer);
     return this;
diff --git a/instrumentation/restlet/restlet-2.0/library/src/main/java/io/opentelemetry/instrumentation/restlet/v2_0/RestletTelemetryBuilder.java b/instrumentation/restlet/restlet-2.0/library/src/main/java/io/opentelemetry/instrumentation/restlet/v2_0/RestletTelemetryBuilder.java
index a933f52cdea4..4db46e110bcd 100644
--- a/instrumentation/restlet/restlet-2.0/library/src/main/java/io/opentelemetry/instrumentation/restlet/v2_0/RestletTelemetryBuilder.java
+++ b/instrumentation/restlet/restlet-2.0/library/src/main/java/io/opentelemetry/instrumentation/restlet/v2_0/RestletTelemetryBuilder.java
@@ -95,7 +95,7 @@ public RestletTelemetryBuilder setEmitExperimentalHttpServerMetrics(
   /** Sets custom {@link SpanNameExtractor} via transform function. */
   @CanIgnoreReturnValue
   public RestletTelemetryBuilder setSpanNameExtractor(
-      Function<SpanNameExtractor<? super Request>, ? extends SpanNameExtractor<? super Request>>
+      Function<SpanNameExtractor<Request>, SpanNameExtractor<Request>>
           spanNameExtractorTransformer) {
     builder.setSpanNameExtractor(spanNameExtractorTransformer);
     return this;
diff --git a/instrumentation/spring/spring-web/spring-web-3.1/library/src/main/java/io/opentelemetry/instrumentation/spring/web/v3_1/SpringWebTelemetryBuilder.java b/instrumentation/spring/spring-web/spring-web-3.1/library/src/main/java/io/opentelemetry/instrumentation/spring/web/v3_1/SpringWebTelemetryBuilder.java
index 26c653fe7918..f8d4e42ba172 100644
--- a/instrumentation/spring/spring-web/spring-web-3.1/library/src/main/java/io/opentelemetry/instrumentation/spring/web/v3_1/SpringWebTelemetryBuilder.java
+++ b/instrumentation/spring/spring-web/spring-web-3.1/library/src/main/java/io/opentelemetry/instrumentation/spring/web/v3_1/SpringWebTelemetryBuilder.java
@@ -60,7 +60,7 @@ public SpringWebTelemetryBuilder addAttributeExtractor(
    */
   @CanIgnoreReturnValue
   public SpringWebTelemetryBuilder addAttributesExtractor(
-      AttributesExtractor<? super HttpRequest, ? super ClientHttpResponse> attributesExtractor) {
+      AttributesExtractor<HttpRequest, ClientHttpResponse> attributesExtractor) {
     builder.addAttributesExtractor(attributesExtractor);
     return this;
   }
@@ -90,9 +90,7 @@ public SpringWebTelemetryBuilder setCapturedResponseHeaders(List<String> respons
   /** Sets custom {@link SpanNameExtractor} via transform function. */
   @CanIgnoreReturnValue
   public SpringWebTelemetryBuilder setSpanNameExtractor(
-      Function<
-              SpanNameExtractor<? super HttpRequest>,
-              ? extends SpanNameExtractor<? super HttpRequest>>
+      Function<SpanNameExtractor<HttpRequest>, SpanNameExtractor<HttpRequest>>
           spanNameExtractorTransformer) {
     builder.setSpanNameExtractor(spanNameExtractorTransformer);
     return this;
diff --git a/instrumentation/spring/spring-webflux/spring-webflux-5.3/library/src/main/java/io/opentelemetry/instrumentation/spring/webflux/v5_3/SpringWebfluxClientTelemetryBuilder.java b/instrumentation/spring/spring-webflux/spring-webflux-5.3/library/src/main/java/io/opentelemetry/instrumentation/spring/webflux/v5_3/SpringWebfluxClientTelemetryBuilder.java
index 3c99207b9f8d..7a3b053cf685 100644
--- a/instrumentation/spring/spring-webflux/spring-webflux-5.3/library/src/main/java/io/opentelemetry/instrumentation/spring/webflux/v5_3/SpringWebfluxClientTelemetryBuilder.java
+++ b/instrumentation/spring/spring-webflux/spring-webflux-5.3/library/src/main/java/io/opentelemetry/instrumentation/spring/webflux/v5_3/SpringWebfluxClientTelemetryBuilder.java
@@ -97,9 +97,7 @@ public SpringWebfluxClientTelemetryBuilder setKnownMethods(Set<String> knownMeth
   /** Sets custom client {@link SpanNameExtractor} via transform function. */
   @CanIgnoreReturnValue
   public SpringWebfluxClientTelemetryBuilder setSpanNameExtractor(
-      Function<
-              SpanNameExtractor<? super ClientRequest>,
-              ? extends SpanNameExtractor<? super ClientRequest>>
+      Function<SpanNameExtractor<ClientRequest>, SpanNameExtractor<ClientRequest>>
           clientSpanNameExtractor) {
     builder.setSpanNameExtractor(clientSpanNameExtractor);
     return this;
diff --git a/instrumentation/spring/spring-webflux/spring-webflux-5.3/library/src/main/java/io/opentelemetry/instrumentation/spring/webflux/v5_3/SpringWebfluxServerTelemetryBuilder.java b/instrumentation/spring/spring-webflux/spring-webflux-5.3/library/src/main/java/io/opentelemetry/instrumentation/spring/webflux/v5_3/SpringWebfluxServerTelemetryBuilder.java
index b00dec6ffefb..1471978bc693 100644
--- a/instrumentation/spring/spring-webflux/spring-webflux-5.3/library/src/main/java/io/opentelemetry/instrumentation/spring/webflux/v5_3/SpringWebfluxServerTelemetryBuilder.java
+++ b/instrumentation/spring/spring-webflux/spring-webflux-5.3/library/src/main/java/io/opentelemetry/instrumentation/spring/webflux/v5_3/SpringWebfluxServerTelemetryBuilder.java
@@ -98,9 +98,7 @@ public SpringWebfluxServerTelemetryBuilder setKnownMethods(Set<String> knownMeth
   /** Sets custom server {@link SpanNameExtractor} via transform function. */
   @CanIgnoreReturnValue
   public SpringWebfluxServerTelemetryBuilder setSpanNameExtractor(
-      Function<
-              SpanNameExtractor<? super ServerWebExchange>,
-              ? extends SpanNameExtractor<? super ServerWebExchange>>
+      Function<SpanNameExtractor<ServerWebExchange>, SpanNameExtractor<ServerWebExchange>>
           serverSpanNameExtractor) {
     builder.setSpanNameExtractor(serverSpanNameExtractor);
     return this;
diff --git a/instrumentation/spring/spring-webflux/spring-webflux-5.3/library/src/main/java/io/opentelemetry/instrumentation/spring/webflux/v5_3/SpringWebfluxTelemetryBuilder.java b/instrumentation/spring/spring-webflux/spring-webflux-5.3/library/src/main/java/io/opentelemetry/instrumentation/spring/webflux/v5_3/SpringWebfluxTelemetryBuilder.java
index 678f83608a22..713f5b6cac36 100644
--- a/instrumentation/spring/spring-webflux/spring-webflux-5.3/library/src/main/java/io/opentelemetry/instrumentation/spring/webflux/v5_3/SpringWebfluxTelemetryBuilder.java
+++ b/instrumentation/spring/spring-webflux/spring-webflux-5.3/library/src/main/java/io/opentelemetry/instrumentation/spring/webflux/v5_3/SpringWebfluxTelemetryBuilder.java
@@ -209,9 +209,7 @@ public SpringWebfluxTelemetryBuilder setEmitExperimentalHttpServerTelemetry(
   @Deprecated
   @CanIgnoreReturnValue
   public SpringWebfluxTelemetryBuilder setClientSpanNameExtractor(
-      Function<
-              SpanNameExtractor<? super ClientRequest>,
-              ? extends SpanNameExtractor<? super ClientRequest>>
+      Function<SpanNameExtractor<ClientRequest>, SpanNameExtractor<ClientRequest>>
           clientSpanNameExtractor) {
     clientBuilder.setSpanNameExtractor(clientSpanNameExtractor);
     return this;
@@ -226,9 +224,7 @@ public SpringWebfluxTelemetryBuilder setClientSpanNameExtractor(
   @Deprecated
   @CanIgnoreReturnValue
   public SpringWebfluxTelemetryBuilder setServerSpanNameExtractor(
-      Function<
-              SpanNameExtractor<? super ServerWebExchange>,
-              ? extends SpanNameExtractor<? super ServerWebExchange>>
+      Function<SpanNameExtractor<ServerWebExchange>, SpanNameExtractor<ServerWebExchange>>
           serverSpanNameExtractor) {
     serverBuilder.setSpanNameExtractor(serverSpanNameExtractor);
     return this;
diff --git a/instrumentation/spring/spring-webmvc/spring-webmvc-5.3/library/src/main/java/io/opentelemetry/instrumentation/spring/webmvc/v5_3/SpringWebMvcTelemetryBuilder.java b/instrumentation/spring/spring-webmvc/spring-webmvc-5.3/library/src/main/java/io/opentelemetry/instrumentation/spring/webmvc/v5_3/SpringWebMvcTelemetryBuilder.java
index a24abdad8105..72c8b31844d9 100644
--- a/instrumentation/spring/spring-webmvc/spring-webmvc-5.3/library/src/main/java/io/opentelemetry/instrumentation/spring/webmvc/v5_3/SpringWebMvcTelemetryBuilder.java
+++ b/instrumentation/spring/spring-webmvc/spring-webmvc-5.3/library/src/main/java/io/opentelemetry/instrumentation/spring/webmvc/v5_3/SpringWebMvcTelemetryBuilder.java
@@ -75,9 +75,7 @@ public SpringWebMvcTelemetryBuilder setCapturedResponseHeaders(List<String> resp
   /** Sets custom {@link SpanNameExtractor} via transform function. */
   @CanIgnoreReturnValue
   public SpringWebMvcTelemetryBuilder setSpanNameExtractor(
-      Function<
-              SpanNameExtractor<? super HttpServletRequest>,
-              ? extends SpanNameExtractor<? super HttpServletRequest>>
+      Function<SpanNameExtractor<HttpServletRequest>, SpanNameExtractor<HttpServletRequest>>
           spanNameExtractor) {
     builder.setSpanNameExtractor(spanNameExtractor);
     return this;
diff --git a/instrumentation/spring/spring-webmvc/spring-webmvc-6.0/library/src/main/java/io/opentelemetry/instrumentation/spring/webmvc/v6_0/SpringWebMvcTelemetryBuilder.java b/instrumentation/spring/spring-webmvc/spring-webmvc-6.0/library/src/main/java/io/opentelemetry/instrumentation/spring/webmvc/v6_0/SpringWebMvcTelemetryBuilder.java
index 7f768b057cbb..519b8aa7d9c4 100644
--- a/instrumentation/spring/spring-webmvc/spring-webmvc-6.0/library/src/main/java/io/opentelemetry/instrumentation/spring/webmvc/v6_0/SpringWebMvcTelemetryBuilder.java
+++ b/instrumentation/spring/spring-webmvc/spring-webmvc-6.0/library/src/main/java/io/opentelemetry/instrumentation/spring/webmvc/v6_0/SpringWebMvcTelemetryBuilder.java
@@ -74,9 +74,7 @@ public SpringWebMvcTelemetryBuilder setCapturedResponseHeaders(List<String> resp
   /** Sets custom {@link SpanNameExtractor} via transform function. */
   @CanIgnoreReturnValue
   public SpringWebMvcTelemetryBuilder setSpanNameExtractor(
-      Function<
-              SpanNameExtractor<? super HttpServletRequest>,
-              ? extends SpanNameExtractor<? super HttpServletRequest>>
+      Function<SpanNameExtractor<HttpServletRequest>, SpanNameExtractor<HttpServletRequest>>
           spanNameExtractor) {
     builder.setSpanNameExtractor(spanNameExtractor);
     return this;