def __init__(self, error, reason=None, details=None, **kwargs):
        super(MeteorError, self).__init__(error, reason, details, kwargs)
Is boolean property empty.
dataset/ETHPy150Open django-ddp/django-ddp/dddp/__init__.py/MeteorError.__init__--crossover with--dataset/ETHPy150Open AppScale/appscale/AppServer/google/appengine/ext/db/__init__.py/BooleanProperty.empty