def __init__(self, algorithm, authenticationRealm):
        self.digest = credentials.DigestCredentialFactory(algorithm,
                                                          authenticationRealm)
:returns:
dataset/ETHPy150Open kuri65536/python-for-android/python-modules/twisted/twisted/web/_auth/digest.py/DigestCredentialFactory.__init__--crossover with--dataset/ETHPy150Open tabo/django-treebeard/treebeard/models.py/Node.get_siblings