def get_metar_from_mission(<EOL>mission_file: str,<EOL>icao: str = '<STR_LIT>',<EOL>time: str = None,<EOL>) -> str:
return _MetarFromMission(<EOL>mission_file=mission_file,<EOL>icao=icao,<EOL>time=time,<EOL>).metar<EOL>
Builds a dummy METAR string from a mission file

Args:
    mission_file: input mission file
    icao: dummy ICAO (defaults to XXXX)
    time: dummy time (defaults to now())

Returns: METAR str