How to use the alephclient.services.entityextract_pb2_grpc.add_EntityExtractServicer_to_server function in alephclient

def serve(port):
    server = grpc.server(futures.ThreadPoolExecutor(max_workers=20))
    add_EntityExtractServicer_to_server(SpacyServicer(), server)
    server.add_insecure_port(port)
    server.start()
    log.info("Server started: %s", port)
    try:
        while True:
            time.sleep(84600)
    except KeyboardInterrupt:
        server.stop(60)

def serve(port):
    executor = futures.ThreadPoolExecutor(max_workers=3)
    server = grpc.server(executor)
    add_EntityExtractServicer_to_server(EntityServicer(), server)
    server.add_insecure_port(port)
    server.start()
    log.info("Server started: %s", port)
    try:
        while True:
            time.sleep(84600)
    except KeyboardInterrupt:
        server.stop(60)

def serve(port):
    executor = futures.ThreadPoolExecutor(max_workers=3)
    server = grpc.server(executor)
    add_EntityExtractServicer_to_server(EntityServicer(), server)
    server.add_insecure_port(port)
    server.start()
    log.info("Server started: %s", port)
    try:
        while True:
            time.sleep(84600)
    except KeyboardInterrupt:
        server.stop(60)