code: function(headerCt, col) {
  		var me = this;
  		var dataIndex = col.dataIndex;
  
  		if (!dataIndex) return;
  		var item = me.containers.get(dataIndex);
  		if (item && item.rendered) {
  			var itemWidth = item.getWidth();
  			var colWidth = me.columns.get(dataIndex).getWidth();
  			if (itemWidth != colWidth) {
  				item.setWidth(me.columns.get(dataIndex).getWidth());
  				item.doLayout();
  			}
  		}
  	}
docs: private