    static ChunkSpec validChunk(grpc::health::v1::HealthCheckResponse::ServingStatus status) {
      ChunkSpec spec;
      spec.valid = true;
      spec.data = serializeResponse(status);
      return spec;
    }
    static ChunkSpec validChunk(grpc::health::v1::HealthCheckResponse::ServingStatus status) {
      ChunkSpec spec;
      spec.valid = true;
      spec.data = serializeResponse(status);
      return spec;
    }