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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def create_stub(generated_create_stub, channel=None, service_path=None, service_port=None, credentials=None, scopes=None, ssl_credentials=None):
 """Creates a gRPC client stub. Args: generated_create_stub (Callable):
 The generated gRPC method to create a stub. channel (grpc.Channel):
 A Channel object through which to make calls. If None, a secure channel is constructed. If specified, all remaining arguments are ignored. service_path (str):
 The domain name of the API remote host. service_port (int):
 The port on which to connect to the remote host. credentials (google.auth.credentials.Credentials):
 The authorization credentials to attach to requests. These credentials identify your application to the service. scopes (Sequence[str]):
 The OAuth scopes for this service. This parameter is ignored if a credentials is specified. ssl_credentials (grpc.ChannelCredentials):
 gRPC channel credentials used to create a secure gRPC channel. If not specified, SSL credentials will be created using default certificates. Returns: grpc.Client: A gRPC client stub. """

    if channel is None:
        target = '{}:{}'.format(service_path, service_port)

        if credentials is None:
            credentials = _grpc_google_auth.get_default_credentials(scopes)

        channel = _grpc_google_auth.secure_authorized_channel(
            credentials, target, ssl_credentials=ssl_credentials)

    return generated_create_stub(channel)