def get_default_log_model():
    if 'django_xworkflows.xworkflow_log' in settings.INSTALLED_APPS:
        return 'xworkflow_log.TransitionLog'
    else:
        return ''
The default log model depends on whether the xworkflow_log app is there.
dataset/ETHPy150Open rbarrois/django_xworkflows/django_xworkflows/models.py/get_default_log_model