public Builder mergeStats(com.google.cloud.tasks.v2beta3.QueueStats value) {
      if (statsBuilder_ == null) {
        if (((bitField0_ & 0x00000800) != 0)
            && stats_ != null
            && stats_ != com.google.cloud.tasks.v2beta3.QueueStats.getDefaultInstance()) {
          getStatsBuilder().mergeFrom(value);
        } else {
          stats_ = value;
        }
      } else {
        statsBuilder_.mergeFrom(value);
      }
      if (stats_ != null) {
        bitField0_ |= 0x00000800;
        onChanged();
      }
      return this;
    }
<pre>
Output only. The realtime, informational statistics for a queue. In order
to receive the statistics the caller should include this field in the
FieldMask.
</pre>

<code>
.google.cloud.tasks.v2beta3.QueueStats stats = 12 [(.google.api.field_behavior) = OUTPUT_ONLY];
</code>
java-tasks/proto-google-cloud-tasks-v2beta3/src/main/java/com/google/cloud/tasks/v2beta3/Queue.java