public Builder mergeResponseStatus(com.google.rpc.Status value) {
      if (responseStatusBuilder_ == null) {
        if (((bitField0_ & 0x00000008) != 0)
            && responseStatus_ != null
            && responseStatus_ != com.google.rpc.Status.getDefaultInstance()) {
          getResponseStatusBuilder().mergeFrom(value);
        } else {
          responseStatus_ = value;
        }
      } else {
        responseStatusBuilder_.mergeFrom(value);
      }
      if (responseStatus_ != null) {
        bitField0_ |= 0x00000008;
        onChanged();
      }
      return this;
    }
<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