oke = 'lime';
      },
      mouseDragLeave: (e, group) => {
        var sh = group.findObject('SHAPE');
        if (sh) sh.stroke = null;
      },
      mouseDrop: dropOntoNode
    })
      .bindTwoWay('isSubGraphExpanded')
      .add(
        new go.Panel('Auto')
          .add(
            new go.Shape('RoundedRectangle', {
              fill: 'rgba(0,0,0,0.05)',
              strokeWidth: 0,
              spot1: go.Spot.TopLeft,
              spot2: go.Spot.BottomRight
            })
              .bind