private com.google.protobuf.SingleFieldBuilderV3<
            com.google.cloud.memorystore.v1beta.PersistenceConfig,
            com.google.cloud.memorystore.v1beta.PersistenceConfig.Builder,
            com.google.cloud.memorystore.v1beta.PersistenceConfigOrBuilder>
        getPersistenceConfigFieldBuilder() {
      if (persistenceConfigBuilder_ == null) {
        persistenceConfigBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.cloud.memorystore.v1beta.PersistenceConfig,
                com.google.cloud.memorystore.v1beta.PersistenceConfig.Builder,
                com.google.cloud.memorystore.v1beta.PersistenceConfigOrBuilder>(
                getPersistenceConfig(), getParentForChildren(), isClean());
        persistenceConfig_ = null;
      }
      return persistenceConfigBuilder_;
    }
<pre>
Optional. Persistence configuration of the instance.
</pre>

<code>
.google.cloud.memorystore.v1beta.PersistenceConfig persistence_config = 14 [(.google.api.field_behavior) = OPTIONAL];
</code>
java-valkey/proto-google-cloud-valkey-v1beta/src/main/java/com/google/cloud/memorystore/v1beta/Instance.java