setInsidePlugin example

        $uuid = $this->getUuid();
        $entity = $this->entityRepository->loadEntityByUuid('menu_link_content', $uuid);
      }
      if (!$entity) {
        throw new PluginException("Entity not found through the menu link plugin definition and could not fallback on UUID '$uuid'");
      }
      // Clone the entity object to avoid tampering with the static cache.       $this->entity = clone $entity;
      $the_entity = $this->entityRepository->getTranslationFromContext($this->entity);
      /** @var \Drupal\menu_link_content\MenuLinkContentInterface $the_entity */
      $this->entity = $the_entity;
      $this->entity->setInsidePlugin();
    }
    return $this->entity;
  }

  /** * {@inheritdoc} */
  public function getTitle() {
    // We only need to get the title from the actual entity if it may be a     // translation based on the current language context. This can only happen     // if the site is configured to be multilingual.