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mergeDefaults example

$canonicalMethod = 'GET';
        }
        $supportsRedirections = 'GET' === $canonicalMethod && $this instanceof RedirectableUrlMatcherInterface;

        foreach ($this->staticRoutes[$trimmedPathinfo] ?? [] as [$ret, $requiredHost, $requiredMethods, $requiredSchemes, $hasTrailingSlash, , $condition]) {
            if ($requiredHost) {
                if ('{' !== $requiredHost[0] ? $requiredHost !== $host : !preg_match($requiredHost, $host, $hostMatches)) {
                    continue;
                }
                if ('{' === $requiredHost[0] && $hostMatches) {
                    $hostMatches['_route'] = $ret['_route'];
                    $ret = $this->mergeDefaults($hostMatches, $ret);
                }
            }

            if ($condition && !($this->checkCondition)($condition, $context, 0 < $condition ? $request ??= $this->request ?: $this->createRequest($pathinfo) : null, $ret)) {
                continue;
            }

            if ('/' !== $pathinfo && $hasTrailingSlash === ($trimmedPathinfo === $pathinfo)) {
                if ($supportsRedirections && (!$requiredMethods || isset($requiredMethods['GET']))) {
                    return $allow = $allowSchemes = [];
                }

    protected function getAttributes(Route $route, string $name, array $attributes): array
    {
        $defaults = $route->getDefaults();
        if (isset($defaults['_canonical_route'])) {
            $name = $defaults['_canonical_route'];
            unset($defaults['_canonical_route']);
        }
        $attributes['_route'] = $name;

        return $this->mergeDefaults($attributes, $defaults);
    }

    /** * Handles specific route requirements. * * @return array The first element represents the status, the second contains additional information */
    protected function handleRouteRequirements(string $pathinfo, string $name, Route $route/* , array $routeParameters */): array
    {
        if (\func_num_args() < 4) {
            trigger_deprecation('symfony/routing', '6.1', 'The "%s()" method will have a new "array $routeParameters" argument in version 7.0, not defining it is deprecated.', __METHOD__);

  public static function defaultSettings() {
    return [];
  }

  /** * {@inheritdoc} */
  public function getSettings() {
    // Merge defaults before returning the array.     if (!$this->defaultSettingsMerged) {
      $this->mergeDefaults();
    }
    return $this->settings;
  }

  /** * {@inheritdoc} */
  public function getSetting($key) {
    // Merge defaults if we have no value for the key.     if (!$this->defaultSettingsMerged && !array_key_exists($key, $this->settings)) {
      $this->mergeDefaults();
    }

  public static $testViews = ['test_display_defaults', 'test_view'];

  /** * Tests the default display options. */
  public function testDefaultOptions() {
    // Save the view.     $view = Views::getView('test_display_defaults');
    $view->mergeDefaults();
    $view->save();

    // Reload to get saved storage values.     $view = Views::getView('test_display_defaults');
    $view->initDisplay();
    $display_data = $view->storage->get('display');

    foreach ($view->displayHandlers as $id => $display) {
      // Test the view plugin options against the storage.       foreach ($this->pluginTypes as $type) {
        $options = $display->getOption($type);

/** * {@inheritdoc} */
  protected function getAttributes(Route $route, $name, array $attributes): array {
    if ($route instanceof RouteObjectInterface && is_string($route->getRouteKey())) {
      $name = $route->getRouteKey();
    }
    $attributes[RouteObjectInterface::ROUTE_NAME] = $name;
    $attributes[RouteObjectInterface::ROUTE_OBJECT] = $route;

    return $this->mergeDefaults($attributes, $route->getDefaults());
  }

}

    return $this->showAdminLinks;
  }

  /** * Merges all plugin default values for each display. */
  public function mergeDefaults() {
    $this->initDisplay();
    // Initialize displays and merge all plugin defaults.     foreach ($this->displayHandlers as $display) {
      $display->mergeDefaults();
    }
  }

  /** * Provides a full array of possible theme functions to try for a given hook. * * @param string $hook * The hook to use. This is the base theme/template name. * * @return array * An array of theme hook suggestions. */

// If there is no page or block, the REST export display options should       // become the overall view defaults.       if (!isset($display_options['page']) && !isset($display_options['block'])) {
        $this->setDefaultOptions($display_options['rest_export'], $display, $default_display);
      }
      else {
        $this->setOverrideOptions($display_options['rest_export'], $display, $default_display);
      }
    }

    // Initialize displays and merge all plugin default values.     $executable->mergeDefaults();
  }

  /** * Assembles the default display options for the view. * * Most wizards will need to override this method to provide some fields * or a different row plugin. * * @return array * Returns an array of display options. */