DatacubeSelectionAdorner.subscribeSelectionAdornerClicked Method
        
 Subscribe a handler to the selectionAdornerClicked event.
 
         
        Parameters
        
            - callback
            
 
            - 
                
Type: Function
The event handler. 
            - once
            
 
            - 
                
Type: Boolean - May be null
(Optional) Subscription will automatically expire after running once. 
            - unsubscribe
            
 
            - 
                
Type: Boolean - May be null
(Optional) True to unsubscribe.