def getServiceNamed(serviceName):
        """
        Retrieve the named service from this application.

        Raise a C{KeyError} if there is no such service name.
        """

        Retrieve the named service from this application.

        Raise a C{KeyError} if there is no such service name.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/internet/interfaces.py