def METHOD_NAME(
    self, theater_unit: TheaterUnit, dcs_unit: Unit
) -> None:
    # Deaths for units at TGOs are recorded in the corresponding GroundUnit within
    # the GroundGroup, so we have to match the dcs unit with the liberation unit
    name = str(dcs_unit.name)
    if name in self.theater_objects:
        raise RuntimeError(f"Duplicate TGO unit: {name}")
    self.theater_objects[name] = TheaterUnitMapping(theater_unit, dcs_unit)