CanvasViewModel.subscribeCommitted Method
        
 Subscribe to the committed event.
 
         
        Parameters
        
            - callback
            
 
            - 
                
Type: function (dundas.controls.ViewModelChange,object)
Event handler. 
            - unsubscribe
            
 
            - 
                
Type: Boolean
True to unsubscribe the handler 
        
        Return Value
        
Type: NotifiedViewModel
        
This object