public com.google.cloud.memorystore.v1.PersistenceConfigOrBuilder
        getPersistenceConfigOrBuilder() {
      if (persistenceConfigBuilder_ != null) {
        return persistenceConfigBuilder_.getMessageOrBuilder();
      } else {
        return persistenceConfig_ == null
            ? com.google.cloud.memorystore.v1.PersistenceConfig.getDefaultInstance()
            : persistenceConfig_;
      }
    }
<pre>
Optional. Persistence configuration of the instance.
</pre>

<code>
.google.cloud.memorystore.v1.PersistenceConfig persistence_config = 14 [(.google.api.field_behavior) = OPTIONAL];
</code>
java-valkey/proto-google-cloud-valkey-v1/src/main/java/com/google/cloud/memorystore/v1/Instance.java