public Builder setPullMessage(
        com.google.cloud.tasks.v2beta2.PullMessage.Builder builderForValue) {
      if (pullMessageBuilder_ == null) {
        payloadType_ = builderForValue.build();
        onChanged();
      } else {
        pullMessageBuilder_.setMessage(builderForValue.build());
      }
      payloadTypeCase_ = 4;
      return this;
    }
<pre>
[LeaseTasks][google.cloud.tasks.v2beta2.CloudTasks.LeaseTasks] to process
the task. Can be set only if
[pull_target][google.cloud.tasks.v2beta2.Queue.pull_target] is set on the
queue.

A pull task is a task that has
[PullMessage][google.cloud.tasks.v2beta2.PullMessage] set.
</pre>

<code>.google.cloud.tasks.v2beta2.PullMessage pull_message = 4;</code>
java-tasks/proto-google-cloud-tasks-v2beta2/src/main/java/com/google/cloud/tasks/v2beta2/Task.java