ween node names.
  // So I have to do a link between this id and the name
  const idToNode = {};
  data.nodes.forEach(function (n) {
    idToNode[n.id] = n;
  });

  // Add the links
  const links = svg
    .selectAll('mylinks')
    .data(data.links)
    .join('path')
    .attr('d', d => {
      start = x(idToNode[d.source].name)    // X position of start node on the X axis
      end = x(idToNode[d.target].name)      // X position of end node
      return ['M', start, height-30,    // the arc starts at the 