Linking nodes in the graph doesn't create links in the nodes

[arsaccol]

Hello! I am using ngraph.graph version ^20.0.0 as specified in my package.json.

I am creating a graph from a file planet-route-data.json like so:

import createGraph from 'ngraph.graph'

function makeTravelGraph () {
    const graph = createGraph()
    const travelGraphData = JSON.parse(fs.readFileSync('./src/planet-route-data.json'))

    // first, we create nodes
    travelGraphData.forEach(sourcePlanet => {
        graph.addNode(sourcePlanet.name)
    })

    // then, we link them
    travelGraphData.forEach(sourcePlanet => {
        sourcePlanet.destinations.forEach(destination => {
            graph.addLink(sourcePlanet.name, destination.name, { fuelCost: destination.cost })
        })
    })

   return graph
}

My planet-route-data.json file looks like this (please ignore the values themselves, haha):

[
    {
        "name": "Earth",
        "destinations": [
            {
                "name": "Mars",
                "cost": 13
            },
            {
                "name": "Venus",
                "cost": 23 
            }
        ]
    },
    {
        "name": "Mars",
        "destinations": [
            {
                "name": "Jupiter",
                "cost": 22
            },
            {
                "name": "Saturn",
                "cost": 25 
            }
        ]
    },
    {
        "name": "Saturn",
        "destinations": [
            {
                "name": "Jupiter",
                "cost": 30 
            },
            {
                "name": "Earth",
                "cost": 12 
            }
        ]
    },

    {
        "name": "Venus",
        "destinations": [
            {
                "name": "Earth",
                "cost": 20 
            },
            {
                "name": "Mars",
                "cost": 25
            },
            {
                "name": "Mercury",
                "cost": 15
            }
        ]
    }
]

The nodes in the graph are being created, and links seem to be created successfully -- that is, I can list them as expected with something like:

returnedGraph.forEachLink(link => {
    console.log(link)
}

However, the nodes themselves, which contain a property named links, do not seem to be updated. If I try to print them, their links property looks like an empty object: {}. If I do:

returnedGraph.forEachLinkedNode(node => {
    console.log(node)
}

nothing is iterated upon, presumably as there are no nodes with links to be found.

Is this, by any chance, by design, or is it not intended behavior?