getResourcePluginManager example

if (in_array($method, $this->getMethods()) && isset($this->configuration[$method]['supported_formats'])) {
      return $this->configuration[$method]['supported_formats'];
    }
    return [];
  }

  /** * {@inheritdoc} */
  public function getPluginCollections() {
    return [
      'resource' => new DefaultSingleLazyPluginCollection($this->getResourcePluginManager(), $this->plugin_id, []),
    ];
  }

  /** * {@inheritdoc} */
  public function calculateDependencies() {
    parent::calculateDependencies();

    foreach ($this->getRestResourceDependencies()->calculateDependencies($this) as $type => $dependencies) {
      foreach ($dependencies as $dependency) {