Procedure input parameter has result in the generated DDL

TEIID31100 Parsing error: Encountered "(4000) [*]result[*]) RETURNS" at line 2, column 52.
Procedure testProc RESULT param p1 must be of type OUT.

CREATE VIRTUAL PROCEDURE testProc (p1 string(4000) result) RETURNS TABLE (xml_out xml) OPTIONS ("REST:METHOD" 'GET', "REST:URI" 'test/{p1}')
	AS
 BEGIN
	SELECT XMLELEMENT(NAME test, XMLFOREST(ProcedureModel.testProc.p1 AS elem1, 'elem2' AS elem2)) AS xml_out;
END;

CREATE VIRTUAL PROCEDURE testProc (p1 string(4000)) RETURNS TABLE (xml_out xml) OPTIONS ("REST:METHOD" 'GET', "REST:URI" 'test/{p1}')
	AS
 BEGIN
	SELECT XMLELEMENT(NAME test, XMLFOREST(ProcedureModel.testProc.p1 AS elem1, 'elem2' AS elem2)) AS xml_out;
END;