How to use the grpclib.client.UnaryStreamMethod function in grpclib

def __init__(self, channel: grpclib.client.Channel) -> None:
        self.UnaryUnary = grpclib.client.UnaryUnaryMethod(
            channel,
            '/dummy.DummyService/UnaryUnary',
            dummy_pb2.DummyRequest,
            dummy_pb2.DummyReply,
        )
        self.UnaryStream = grpclib.client.UnaryStreamMethod(
            channel,
            '/dummy.DummyService/UnaryStream',
            dummy_pb2.DummyRequest,
            dummy_pb2.DummyReply,
        )
        self.StreamUnary = grpclib.client.StreamUnaryMethod(
            channel,
            '/dummy.DummyService/StreamUnary',
            dummy_pb2.DummyRequest,
            dummy_pb2.DummyReply,
        )
        self.StreamStream = grpclib.client.StreamStreamMethod(
            channel,
            '/dummy.DummyService/StreamStream',
            dummy_pb2.DummyRequest,
            dummy_pb2.DummyReply,

def __init__(self, channel: grpclib.client.Channel) -> None:
        self.Plaster = grpclib.client.UnaryUnaryMethod(
            channel,
            '/Bombed/Plaster',
            bombed_pb2.SavoysRequest,
            bombed_pb2.SavoysReply,
        )
        self.Benzine = grpclib.client.UnaryStreamMethod(
            channel,
            '/Bombed/Benzine',
            bombed_pb2.SavoysRequest,
            bombed_pb2.GoowyChunk,
        )
        self.Anginal = grpclib.client.StreamUnaryMethod(
            channel,
            '/Bombed/Anginal',
            bombed_pb2.UnyoungChunk,
            bombed_pb2.SavoysReply,
        )
        self.Devilry = grpclib.client.StreamStreamMethod(
            channel,
            '/Bombed/Devilry',
            bombed_pb2.UnyoungChunk,
            bombed_pb2.GoowyChunk,

def __init__(self, channel: grpclib.client.Channel) -> None:
        self.Check = grpclib.client.UnaryUnaryMethod(
            channel,
            '/grpc.health.v1.Health/Check',
            grpclib.health.v1.health_pb2.HealthCheckRequest,
            grpclib.health.v1.health_pb2.HealthCheckResponse,
        )
        self.Watch = grpclib.client.UnaryStreamMethod(
            channel,
            '/grpc.health.v1.Health/Watch',
            grpclib.health.v1.health_pb2.HealthCheckRequest,
            grpclib.health.v1.health_pb2.HealthCheckResponse,
        )

def __init__(self, channel: grpclib.client.Channel) -> None:
        self.UnaryUnaryGreeting = grpclib.client.UnaryUnaryMethod(
            channel,
            '/helloworld.Greeter/UnaryUnaryGreeting',
            helloworld.helloworld_pb2.HelloRequest,
            helloworld.helloworld_pb2.HelloReply,
        )
        self.UnaryStreamGreeting = grpclib.client.UnaryStreamMethod(
            channel,
            '/helloworld.Greeter/UnaryStreamGreeting',
            helloworld.helloworld_pb2.HelloRequest,
            helloworld.helloworld_pb2.HelloReply,
        )
        self.StreamUnaryGreeting = grpclib.client.StreamUnaryMethod(
            channel,
            '/helloworld.Greeter/StreamUnaryGreeting',
            helloworld.helloworld_pb2.HelloRequest,
            helloworld.helloworld_pb2.HelloReply,
        )
        self.StreamStreamGreeting = grpclib.client.StreamStreamMethod(
            channel,
            '/helloworld.Greeter/StreamStreamGreeting',
            helloworld.helloworld_pb2.HelloRequest,
            helloworld.helloworld_pb2.HelloReply,

def __init__(self, channel: grpclib.client.Channel) -> None:
        self.UnaryUnaryGreeting = grpclib.client.UnaryUnaryMethod(
            channel,
            '/helloworld.Greeter/UnaryUnaryGreeting',
            streaming.helloworld_pb2.HelloRequest,
            streaming.helloworld_pb2.HelloReply,
        )
        self.UnaryStreamGreeting = grpclib.client.UnaryStreamMethod(
            channel,
            '/helloworld.Greeter/UnaryStreamGreeting',
            streaming.helloworld_pb2.HelloRequest,
            streaming.helloworld_pb2.HelloReply,
        )
        self.StreamUnaryGreeting = grpclib.client.StreamUnaryMethod(
            channel,
            '/helloworld.Greeter/StreamUnaryGreeting',
            streaming.helloworld_pb2.HelloRequest,
            streaming.helloworld_pb2.HelloReply,
        )
        self.StreamStreamGreeting = grpclib.client.StreamStreamMethod(
            channel,
            '/helloworld.Greeter/StreamStreamGreeting',
            streaming.helloworld_pb2.HelloRequest,
            streaming.helloworld_pb2.HelloReply,

buf.add('')
        buf.add('')
        buf.add('class {}Stub:', service.name)
        with buf.indent():
            buf.add('')
            buf.add('def __init__(self, channel: {}.{}) -> None:'
                    .format(client.__name__, client.Channel.__name__))
            with buf.indent():
                for method in service.methods:
                    name, cardinality, request_type, reply_type = method
                    full_name = '/{}/{}'.format(service_name, name)
                    method_cls: type
                    if cardinality is const.Cardinality.UNARY_UNARY:
                        method_cls = client.UnaryUnaryMethod
                    elif cardinality is const.Cardinality.UNARY_STREAM:
                        method_cls = client.UnaryStreamMethod
                    elif cardinality is const.Cardinality.STREAM_UNARY:
                        method_cls = client.StreamUnaryMethod
                    elif cardinality is const.Cardinality.STREAM_STREAM:
                        method_cls = client.StreamStreamMethod
                    else:
                        raise TypeError(cardinality)
                    method_cls = cast(type, method_cls)  # FIXME: redundant
                    buf.add('self.{} = {}.{}('.format(name, client.__name__,
                                                      method_cls.__name__))
                    with buf.indent():
                        buf.add('channel,')
                        buf.add('{!r},'.format(full_name))
                        buf.add('{},', request_type)
                        buf.add('{},', reply_type)
                    buf.add(')')
    return buf.content()