public com.google.cloud.memorystore.v1.MaintenancePolicy getMaintenancePolicy() {
      if (maintenancePolicyBuilder_ == null) {
        return maintenancePolicy_ == null
            ? com.google.cloud.memorystore.v1.MaintenancePolicy.getDefaultInstance()
            : maintenancePolicy_;
      } else {
        return maintenancePolicyBuilder_.getMessage();
      }
    }
<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>

@return The maintenancePolicy.
java-valkey/proto-google-cloud-valkey-v1/src/main/java/com/google/cloud/memorystore/v1/Instance.java