private com.google.protobuf.SingleFieldBuilderV3<
            com.google.cloud.tasks.v2.Attempt,
            com.google.cloud.tasks.v2.Attempt.Builder,
            com.google.cloud.tasks.v2.AttemptOrBuilder>
        getFirstAttemptFieldBuilder() {
      if (firstAttemptBuilder_ == null) {
        firstAttemptBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.cloud.tasks.v2.Attempt,
                com.google.cloud.tasks.v2.Attempt.Builder,
                com.google.cloud.tasks.v2.AttemptOrBuilder>(
                getFirstAttempt(), getParentForChildren(), isClean());
        firstAttempt_ = null;
      }
      return firstAttemptBuilder_;
    }
<pre>
Output only. The status of the task's first attempt.

Only [dispatch_time][google.cloud.tasks.v2.Attempt.dispatch_time] will be
set. The other [Attempt][google.cloud.tasks.v2.Attempt] information is not
retained by Cloud Tasks.
</pre>

<code>.google.cloud.tasks.v2.Attempt first_attempt = 9;</code>
java-tasks/proto-google-cloud-tasks-v2/src/main/java/com/google/cloud/tasks/v2/Task.java