private com.google.protobuf.SingleFieldBuilderV3<
            com.google.rpc.Status, com.google.rpc.Status.Builder, com.google.rpc.StatusOrBuilder>
        getResponseStatusFieldBuilder() {
      if (responseStatusBuilder_ == null) {
        responseStatusBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.rpc.Status,
                com.google.rpc.Status.Builder,
                com.google.rpc.StatusOrBuilder>(
                getResponseStatus(), getParentForChildren(), isClean());
        responseStatus_ = null;
      }
      return responseStatusBuilder_;
    }
<pre>
Output only. The response from the worker for this attempt.

If `response_time` is unset, then the task has not been attempted or is
currently running and the `response_status` field is meaningless.
</pre>

<code>.google.rpc.Status response_status = 4;</code>
java-tasks/proto-google-cloud-tasks-v2/src/main/java/com/google/cloud/tasks/v2/Attempt.java