RepeaterTemplateCell.toggleCollapse Method
        
 Toggle the template cell between its collapsed and expanded state.
 
         
        Parameters
        
            - collapseHorizontally
            
 
            - 
                
Type: Boolean
True to collapse horizontally. 
            - toggleByAdapter
            
 
            - 
                
Type: Adapter
The adapter that causes this toggling to occur. 
        
        Return Value
        
Type: Boolean
        
True if successful.