columnName = "row[\"" + group.getKeyColumn( ) +"\"]";
columnName = ExpressionUtil.createJSRowExpression( group.getKeyColumn( ) );
		private String getGroupKeyExpression( GroupDefinition group )		{			String columnName;			if ( group.getKeyColumn( ) != null )			{				columnName = "row[\"" + group.getKeyColumn( ) +"\"]";			}			else			{				columnName = group.getKeyExpression( );			}						return columnName;		}