Initial Drupal 11 with DDEV setup

web/core/modules/language/src/LanguageNegotiationMethodInterface.php

@@ -0,0 +1,67 @@
+<?php
+
+namespace Drupal\language;
+
+use Drupal\Core\Config\ConfigFactoryInterface;
+use Drupal\Core\Language\LanguageInterface;
+use Drupal\Core\Session\AccountInterface;
+use Symfony\Component\HttpFoundation\Request;
+
+/**
+ * Interface for language negotiation classes.
+ */
+interface LanguageNegotiationMethodInterface {
+
+  /**
+   * Injects the language manager.
+   *
+   * @param \Drupal\language\ConfigurableLanguageManagerInterface $language_manager
+   *   The language manager to be used to retrieve the language list and the
+   *   already negotiated languages.
+   */
+  public function setLanguageManager(ConfigurableLanguageManagerInterface $language_manager);
+
+  /**
+   * Injects the configuration factory.
+   *
+   * @param \Drupal\Core\Config\ConfigFactoryInterface $config
+   *   The configuration factory.
+   */
+  public function setConfig(ConfigFactoryInterface $config);
+
+  /**
+   * Injects the current user.
+   *
+   * @param \Drupal\Core\Session\AccountInterface $current_user
+   *   The current active user.
+   */
+  public function setCurrentUser(AccountInterface $current_user);
+
+  /**
+   * Performs language negotiation.
+   *
+   * @param \Symfony\Component\HttpFoundation\Request $request
+   *   (optional) The current request. Defaults to NULL if it has not been
+   *   initialized yet.
+   *
+   * @return string|null|false
+   *   A valid language code if the negotiation was successful and either NULL
+   *    or FALSE otherwise.
+   *
+   * @todo Determine whether string|false or string|null should be the
+   *   normalized result across all implementations and update the @return and
+   *   its comment accordingly.
+   *
+   * @see https://www.drupal.org/node/3329952
+   */
+  public function getLangcode(?Request $request = NULL);
+
+  /**
+   * Notifies the plugin that the language code it returned has been accepted.
+   *
+   * @param \Drupal\Core\Language\LanguageInterface $language
+   *   The accepted language.
+   */
+  public function persist(LanguageInterface $language);
+
+}