util.JSONArray.create() creates a new JSON array.
Syntax
CALL util.JSONArray.create()
Usage and examples
An array newly created by
util.JSONArray.create() must be assigned to a variable of the util.JSONArray datatype:
MAIN
DEFINE json_arr util.JSONArray
LET json_arr = util.JSONArray.create()
...
CALL fgl_getkey()
END MAIN