def get_gps_time(can0, wait=100):
"""
Return the current GPS time from the NMEA network.
If no GPS time message is heard on the network after a specified number of
seconds an exception is thrown.
Parameters
----------
can0 : can.BusABC
wait : int, optional
The number of seconds to wait for a GPS time message before giving up
and throwing an exception. The default is 100.
Returns
-------
datetime.
"""
What is the GPS time message ID?