How to use the gojs.Adornment function in gojs

ngAfterViewInit(): void {
        this.myDiagram = this.$(go.Diagram, this.div.nativeElement,
            {
                initialContentAlignment: go.Spot.Center,
                padding: 10,
                isReadOnly: false,
                'animationManager.isEnabled': false, // disable Animation
                'allowVerticalScroll': false, // no vertical scroll for diagram
                'toolManager.mouseWheelBehavior': go.ToolManager.WheelNone // do not zoom diagram on wheel scroll
            });
        this.myDiagram.addLayerBefore(this.$(go.Layer, { name: 'red' }), this.myDiagram.findLayer('Grid'));
        this.myDiagram.addLayerBefore(this.$(go.Layer, { name: 'green' }), this.myDiagram.findLayer('Grid'));
        let commonToolTip = this.$(go.Adornment, 'Auto',
            {
                isShadowed: true
            },
            this.$(go.Shape, { fill: '#FFFFCC' }),
            this.$(go.Panel, 'Vertical',
                {
                    margin: 3
                },
                this.$(go.TextBlock,  // bound to node data
                    {
                        margin: 4, font: 'bold 12pt sans-serif'
                    },
                    new go.Binding('text')),
                this.$(go.TextBlock,  // bound to Adornment because of call to Binding.ofObject
                    new go.Binding('text', '',
                        (ad) => {

var pos = myDiagram.model.modelData.position;
    if (pos) myDiagram.initialPosition = go.Point.parse(pos);

    // initialize the Palette that is on the left side of the page
    myPalette =
      $(go.Palette, "myPaletteDiv",  // must name or refer to the DIV HTML element
        {
          maxSelectionCount: 1,
          nodeTemplateMap: myDiagram.nodeTemplateMap,  // share the templates used by myDiagram
          linkTemplate: // simplify the link template, just in this Palette
            $(go.Link,
              { // because the GridLayout.alignment is Location and the nodes have locationSpot == Spot.Center,
                // to line up the Link in the same manner we have to pretend the Link has the same location spot
                locationSpot: go.Spot.Center,
                selectionAdornmentTemplate:
                  $(go.Adornment, "Link",
                    { locationSpot: go.Spot.Center },
                    $(go.Shape,
                      { isPanelMain: true, fill: null, stroke: "deepskyblue", strokeWidth: 0 }),
                    $(go.Shape,  // the arrowhead
                      { toArrow: "Standard", stroke: null })
                  )
              },
              {
                routing: go.Link.AvoidsNodes,
                curve: go.Link.JumpOver,
                corner: 5,
                toShortLength: 4
              },
              new go.Binding("points"),
              $(go.Shape,  // the link path shape
                { isPanelMain: true, strokeWidth: 2 }),