         
         private var _columns:IList = null; // list of GridColumns
         private var columnsChanged:Boolean = false;
-        private var generatedColumns:Boolean = false;
         
         [Bindable("columnsChanged")]
         

            
            gridDimensions.fixedRowHeight = (value) ? NaN : rowHeight;
            
            dispatchChangeEvent("variableRowHeightChanged");            
        }
        

         */
        public function get columns():IList
        {
            return _columns;
        }
        
