ExprManagerUtil util = new ExprManagerUtil( );
ExprManagerUtil util = new ExprManagerUtil( exprManager );
	public static void validateColumnBinding( ExprManager exprManager )			throws DataException	{		ExprManagerUtil util = new ExprManagerUtil( );				util.exprManager = exprManager;		util.checkColumnBindingExpression();		util.checkDependencyCycle( ); 		util.checkGroupNameValidation( );	}