initTableLayout example

  public function __construct(EntityTypeInterface $entity_type, Connection $database, EntityFieldManagerInterface $entity_field_manager, CacheBackendInterface $cache, LanguageManagerInterface $language_manager, MemoryCacheInterface $memory_cache, EntityTypeBundleInfoInterface $entity_type_bundle_info, EntityTypeManagerInterface $entity_type_manager) {
    parent::__construct($entity_type, $entity_field_manager, $cache, $memory_cache, $entity_type_bundle_info);
    $this->database = $database;
    $this->languageManager = $language_manager;
    $this->entityTypeManager = $entity_type_manager;
    $this->entityType = $this->entityTypeManager->getActiveDefinition($entity_type->id());
    $this->fieldStorageDefinitions = $this->entityFieldManager->getActiveFieldStorageDefinitions($entity_type->id());

    $this->initTableLayout();
  }

  /** * Initializes table name variables. */
  protected function initTableLayout() {
    // Reset table field values to ensure changes in the entity type definition     // are correctly reflected in the table layout.     $this->tableMapping = NULL;
    $this->revisionKey = NULL;
    $this->revisionTable = NULL;