public com.google.cloud.memorystore.v1.MaintenancePolicy.Builder getMaintenancePolicyBuilder() {
      bitField0_ |= 0x04000000;
      onChanged();
      return getMaintenancePolicyFieldBuilder().getBuilder();
    }
<pre>
Optional. The maintenance policy for the instance. If not provided,
the maintenance event will be performed based on Memorystore
internal rollout schedule.
</pre>

<code>
.google.cloud.memorystore.v1.MaintenancePolicy maintenance_policy = 31 [(.google.api.field_behavior) = OPTIONAL];
</code>
java-valkey/proto-google-cloud-valkey-v1/src/main/java/com/google/cloud/memorystore/v1/Instance.java