public Builder clearResponseTime() {
      bitField0_ = (bitField0_ & ~0x00000004);
      responseTime_ = null;
      if (responseTimeBuilder_ != null) {
        responseTimeBuilder_.dispose();
        responseTimeBuilder_ = null;
      }
      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