transmuter-1.0.0-alpha2/src/Plugin/TransmuterInterface.php

<?php

namespace Drupal\transmuter\Plugin;

use Drupal\Component\Plugin\PluginInspectionInterface;

/**
 * Base interface for implementing Transmuter plugins.
 *
 * @see \Drupal\transmuter\Plugin\TransmuterDefinition
 */
interface TransmuterInterface extends PluginInspectionInterface {

  /**
   * Preprocesses a render element.
   *
   * This method is normally triggered during the theme preprocess hooks and is
   * meant to alter theme variables before they are used by a Twig template.
   *
   * The preprocess() is called for each of the defined them hooks in the
   * TransmuterDefinition::hooks
   *
   * @param array $variables
   *   A reference to the render element being preprocessed. Like Drupal
   *   preprocess hooks this method alters the variables as needed.
   * @param string $hook
   *   The preprocess hook that triggered this preprocess call.
   * @param array $info
   *   The theme registry definition for the item being preprocessed.
   */
  public function preprocess(array &$variables, $hook, array $info = []): void;

}