Adding new NodeSet

• Trying to add new NodeSet to topology using the addNodeSet method. However getting "Cannot read property 'parentVertexSetID' of undefined" error. See this fiddle: NeXt nodeset - JSFiddle 

 topo.addNodeSet(topologyData.nodeSet[0],{})

 will update NeXt make the second parameter as optional.

• Is there a method for removing NodeSet from topology. Tried the removeNode method but couldn't make it work. What about adding node to existing NodeSet.

Add node to nodeSet could be a little bit tricky. We don't have that feature before.

http://jsfiddle.net/nextsupport/f2eehbhz/

In this demo(removeNode&insertNodetoNodeSet - JSFiddle)  implement a function called 'addNodeToNodeSet', you can use this function. It's not add that to framework yet. 

function addNodeToNodeSet(topo, pid, nodeData) {
  if (!topo || !pid || !nodeData) {
    return;
  }
  var graph = topo.graph();
  var nodeSet = topo.getNode(pid);
  if (nodeSet) {
    var vertexSet = nodeSet.model();
    var vertex = graph._addVertex(nodeData);
    vertexSet.addVertex(vertex);
    graph.updateVertexSet(vertex);
    if (!nodeSet.collapsed()) {
      var animation = nodeSet.animation();
      nodeSet.animation(false);
      nodeSet.collapsed(true);
      nodeSet.collapsed(false);
      nodeSet.animation(animation);
    }
  }
}