human
I wrote the below code

    @implementer(IStreamClientEndpoint)
    class ClientTestEndpoint(object, ):
        def connect(self, factory):
            result = Deferred()
            info.passedFactories.append(factory)
            @result.addCallback
            def createProtocol(ignored):
                protocol = factory.buildProtocol(None)
                info.constructedProtocols.append(protocol)
                transport = StringTransport()
                protocol.makeConnection(transport)
                return protocol
            info.connectQueue.append(result)
            if fireImmediately:
                result.callback(None)
            return result
    info = ConnectInformation()
    return (info, ClientTestEndpoint())

What's a good function header?

Here's a good function header?
assistant
#Here's a good function header.

def endpointForTesting(fireImmediately=False):