@java.lang.Override
  public Builder toBuilder() {
    return this == DEFAULT_INSTANCE ? new Builder() : new Builder().mergeFrom(this);
  }
<pre>
The status of the maintenance.
</pre>

<code>
optional .google.cloud.tpu.v2alpha1.UpcomingMaintenance.MaintenanceStatus maintenance_status = 9;
</code>

@return The maintenanceStatus.
java-tpu/proto-google-cloud-tpu-v2alpha1/src/main/java/com/google/cloud/tpu/v2alpha1/UpcomingMaintenance.java