func (c *greeterServiceProtobufClient) Sign(ctx context.Context, in *SignRequest) (*SignResponse, error) {
    ctx = ctxsetters.WithPackageName(ctx, "api.rpc.v1")
    ctx = ctxsetters.WithServiceName(ctx, "GreeterService")
    ctx = ctxsetters.WithMethodName(ctx, "Sign")
    caller := c.callSign