JSAPI 4.0 get count of graphics at / behind point

[SamBartlett]

I have a map that I am drawing a large set of points onto using a graphics layer. The points are sometimes at the same coordinates - so sometimes the popups for the points drawn under the top point are inaccessible. Is there a way to show a "next >" button on the popup templates to expose these hidden points?

[SafeTRECUCB]

Yes. You can do by opening the popup manually. results is featureSet from querytask of spatial query around click event on the layer. 

view.popup.open({
   features: results,
   updateLocationEnabled: true
});