          if not self._widget_config:
              self.compile_widget_config()
          self.destroy_children()
          self.repack_columns()
          self.pack_widget_clones(self._widget_config)
  
      def validate(self, width):
          """ Validate that passed in width should trigger column re-arranging """
          if ((width < self.single_column_width and self.columns == 1) or
 
</s> remove         """ Returns the number if items held in this containter """
 </s> add         """ Returns the number of items held in this containter """
        # Reset counters
        self._items = 0
        self._idx = 0
          if not self._widget_config:
              self.compile_widget_config()
          self.destroy_children()
          self.repack_columns()
        # Reset counters
        self._items = 0
        self._idx = 0
          self.pack_widget_clones(self._widget_config)
  
      def validate(self, width):
          """ Validate that passed in width should trigger column re-arranging """
          if ((width < self.single_column_width and self.columns == 1) or
keep keep keep add keep keep keep keep keep
 GUI: Fix disappearing columns on resize 
lib/gui/control_helper.py