public Builder setResponseTime(com.google.protobuf.Timestamp value) {
      if (responseTimeBuilder_ == null) {
        if (value == null) {
          throw new NullPointerException();
        }
        responseTime_ = value;
      } else {
        responseTimeBuilder_.setMessage(value);
      }
      bitField0_ |= 0x00000004;
      onChanged();
      return this;
    }
<pre>
Output only. The time that this attempt response was received.

`response_time` will be truncated to the nearest microsecond.
</pre>

<code>.google.protobuf.Timestamp response_time = 3;</code>
java-tasks/proto-google-cloud-tasks-v2/src/main/java/com/google/cloud/tasks/v2/Attempt.java