Point within a Viewshed (JavaSDK)

[KrishangPatney]

Hi, 
I am trying to find if a point exists within a viewshed or not. Here are some screenshots of what I am trying, 

KrishangPatney_0-1614474916086.png

KrishangPatney_2-1614474930377.png

this uses the javaSDK arcgisAPI 

Thanks.