In SelectionGrouped listener, Group location returning NaN

@JP wrote:

Hi,
This is my group template. In that I have two way binded the group lcaotion.

Group template:

myDiagram.groupTemplate =
  $(go.Group, "Vertical",
    {
      resizable: true, resizeObjectName: "SHAPE",
      selectionObjectName: "SHAPE",
      locationObjectName: "SHAPE",ungroupable: true,
   mouseDrop: finishDrop
    },
    new go.Binding("location").makeTwoWay(),
    $(go.TextBlock, { font: "bold 11pt sans-serif" },
      new go.Binding("text", "key")),
    $(go.Shape, { name: "SHAPE", fill: "whitesmoke" },
      new go.Binding("desiredSize").makeTwoWay())
  );

SelectionGrouped Listener:

myDiagram.addDiagramListener("SelectionGrouped", function(e) {
console.log(e.diagram.selection.first().location) // returning NaN, NaN
console.log(e.diagram.selection.first().data) // Here value is printing
})

In this listener, at first time I am always getting location as NaN. Can you tell me how to get group location in SelectionGroupped?

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