Compilation error when creating pl/sql stored procedure - oracle

Question

I'm trying to create a stored procedure that used REF CURSOR. I am using this website to find some examples. First I created types:
CREATE OR REPLACE TYPE ROW_TYPE IS OBJECT (
"COL1" CHAR(3 BYTE),
"COL2" NUMBER(4,0)
)
CREATE TYPE ROW_TYPE_TABLE AS TABLE OF ROW_TYPE;
Then created packages:
CREATE OR REPLACE PACKAGE package AS
FUNCTION get_by_id(p_id CHAR) RETURN ROW_TYPE_TABLE PIPELINED;
END package;
But when creating package body using the following command I get the following message PLS-00103: Encountered the symbol "FOR"
I have checked on Oracle official website how to use the open-for statement but can't find my mistake.
CREATE OR REPLACE PACKAGE BODY package AS
FUNCTION get_by_id(p_idCHAR) RETURN SERV_TYPE_TABLE PIPELINED IS
OUT_REC SERV_TYPE_TABLE := SERV_TYPE_TABLE(null,null);
servCursor sys_refcursor;
OPEN servCursor FOR 'SELECT * FROM SERV WHERE COL1= :1' USING p_id;
LOOP
FETCH servCursor INTO OUT_REC.COL1, OUT_REC.COL;
EXIT WHEN servCursor%NOTFOUND;
PIPE ROW(OUT_REC);
END LOOP;
CLOSE servCursor;
RETURN;
END get_by_id;
END package ;
Do you see any problem in the code submitted?
Regards.

Answer 1

PL/SQL functions have the structure:
FUNCTION <function name>(parameter1 <type>, ...) RETURN <return type> IS
<variable declarations>
BEGIN
<function body (code)>
END <function name>;
You forgot the BEGIN.