def receive():
        """
        Create a consumer which will write to this file.  This method may
        only be invoked once on each provider.

        @rtype: C{Deferred} of C{IConsumer}
        """

        Create a consumer which will write to this file.  This method may
        only be invoked once on each provider.

        @rtype: C{Deferred} of C{IConsumer}
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/protocols/ftp.py