code: public CallOptions withWaitForReady() {
      CallOptions newOptions = new CallOptions(this);
      newOptions.waitForReady = Boolean.TRUE;
      return newOptions;
    }
docs: Enables <a href="https://github.com/grpc/grpc/blob/master/doc/wait-for-ready.md">
  'wait for ready'</a> feature for the call. 'Fail fast' is the default option for gRPC calls
  and 'wait for ready' is the opposite to it.