GrpcServerResponse extends RpcServerResponse implements GrpcResponse { @Override public Status unwrap() { return status; } GrpcServerResponse(GrpcServerRequest request, Metadata headers, Status status,
      Metadata trailers); @Override Status unwrap(); @Override GrpcServerRequest request(); @Override @Nullable Throwable error(); @Override @Nullable String errorCode(); @Override Metadata headers(); @Override Status status(); @Override Metadata trailers();  }
@Test public void unwrap() { assertThat(response.unwrap()).isSameAs(status); }