public Builder clearUpcomingMaintenance() {
      bitField0_ = (bitField0_ & ~0x08000000);
      upcomingMaintenance_ = null;
      if (upcomingMaintenanceBuilder_ != null) {
        upcomingMaintenanceBuilder_.dispose();
        upcomingMaintenanceBuilder_ = null;
      }
      onChanged();
      return this;
    }
<pre>
Output only. Upcoming maintenance on this TPU node.
</pre>

<code>
.google.cloud.tpu.v2alpha1.UpcomingMaintenance upcoming_maintenance = 51 [(.google.api.field_behavior) = OUTPUT_ONLY];
</code>
java-tpu/proto-google-cloud-tpu-v2alpha1/src/main/java/com/google/cloud/tpu/v2alpha1/Node.java