def __init__(self, reactor, port, backlog=50, interface=''):
        _TCPServerEndpoint.__init__(self, reactor, port, backlog, interface)
Takes a username as a string and returns a boolean. True indicates that
dataset/ETHPy150Open nlloyd/SubliminalCollaborator/libs/twisted/internet/endpoints.py/TCP4ServerEndpoint.__init__--crossover with--dataset/ETHPy150Open saltstack/salt/salt/acl/__init__.py/PublisherACL.user_is_blacklisted