def clean_messages(sender, **kwargs):
    if kwargs['created'] == False:
        if kwargs['instance'].users.count() == 0:
            kwargs['instance'].delete()
Generate help text (a list of strings, one per suggested line of
dataset/ETHPy150Open fp7-ofelia/ocf/expedient/src/python/expedient/common/messaging/models.py/clean_messages--crossover with--dataset/ETHPy150Open azoft-dev-team/imagrium/env/Lib/distutils/fancy_getopt.py/FancyGetopt.generate_help