if ( COLUMN_AGGREGATEON.equals( property ) ) { ComputedColumnHandle handle = ( (ComputedColumnHandle) element ); if ( !ExpressionUtil.hasAggregation( handle.getExpression( ) ) || DEUtil.getGroupControlType( inputElement ) .equals( DEUtil.TYPE_GROUP_NONE ) ) { return false; } }
		public boolean canModify( Object element, String property )		{			if ( property == null					|| ( element == dummyChoice && !COLUMN_NAME.equals( property ) ) )			{				return false;			}			return true;		}