ContextMenuService.showContextMenu Method
        
 Shows the context menu.
 
         
        Parameters
        
            - commands
            
 
            - 
                
Type: Array
ElementType: Command
The commands to show in the context menu. 
            - eventArgs
            
 
            - 
                
Type: EventArgs
(optional) The event arguments to use to configure the menu (eg: position). If this isn't specified, then the last known position is used.
Optional: True 
            - canvasEventData
            
 
            - 
                
Type: Object
(optional) Event data with further positional information from the canvas.
Optional: True