ConfigurableLanguageInterface.php

<?php

namespace Drupal\language;

use Drupal\Core\Config\Entity\ConfigEntityInterface;
use Drupal\Core\Language\LanguageInterface;

/**
 * Provides an interface defining a language entity.
 */
interface ConfigurableLanguageInterface extends ConfigEntityInterface, LanguageInterface {
    
    /**
     * Sets the name of the language.
     *
     * @param string $name
     *   The human-readable English name of the language.
     *
     * @return $this
     */
    public function setName($name);
    
    /**
     * Sets the weight of the language.
     *
     * @param int $weight
     *   The weight, used to order languages with larger positive weights sinking
     *   items toward the bottom of lists.
     *
     * @return $this
     */
    public function setWeight($weight);

}