def is_timestamp(obj):
    return isinstance(obj, datetime.datetime)
Set heading to maintain.
dataset/ETHPy150Open STIXProject/python-stix/stix/utils/__init__.py/is_timestamp--crossover with--dataset/ETHPy150Open FishPi/FishPi-POCV---Command---Control/fishpi/control/navigation.py/NavigationUnit.set_heading