in spectator/meter/gauge.py [0:0]
def __init__(self, meter_id: MeterId, writer: WriterUnion = new_writer("none"),
ttl_seconds: Optional[int] = None) -> None:
if ttl_seconds is None:
meter_type_symbol = "g"
else:
meter_type_symbol = f"g,{ttl_seconds}"
super().__init__(meter_id, writer, meter_type_symbol)