interface DerivablePluginDefinitionInterface

interface DerivablePluginDefinitionInterface extends PluginDefinitionInterface {
    
    /**
     * Gets the name of the deriver of this plugin definition, if it exists.
     *
     * @return string|null
     *   Either the deriver class name, or NULL if the plugin is not derived.
     */
    public function getDeriver();
    
    /**
     * Sets the deriver of this plugin definition.
     *
     * @param string|null $deriver
     *   Either the name of a class that implements
     *   \Drupal\Component\Plugin\Derivative\DeriverInterface, or NULL.
     *
     * @return $this
     */
    public function setDeriver($deriver);

}