Example 2: Modify a StringBuffer with a function

MAIN
  DEFINE buf base.StringBuffer 
  LET buf = base.StringBuffer.create()
  CALL modify(buf)
  DISPLAY "buf is ", buf.toString()
END MAIN

FUNCTION modify(sb)
  DEFINE sb base.StringBuffer 
  CALL sb.append("more")
  DISPLAY "sb is ", sb.toString()
END FUNCTION

Output:

sb is more
buf is more