interface LocalTaskManagerInterface

interface LocalTaskManagerInterface extends PluginManagerInterface {
    
    /**
     * Gets the title for a local task.
     *
     * @param \Drupal\Core\Menu\LocalTaskInterface $local_task
     *   A local task plugin instance to get the title for.
     *
     * @return string
     *   The localized title.
     */
    public function getTitle(LocalTaskInterface $local_task);
    
    /**
     * Find all local tasks that appear on a named route.
     *
     * @param string $route_name
     *   The route for which to find local tasks.
     *
     * @return array
     *   Returns an array of task levels. Each task level contains instances
     *   of local tasks (LocalTaskInterface) which appear on the tab route.
     *   The array keys are the depths and the values are arrays of plugin
     *   instances.
     */
    public function getLocalTasksForRoute($route_name);
    
    /**
     * Gets the render array for all local tasks.
     *
     * @param string $current_route_name
     *   The route for which to make renderable local tasks.
     * @param \Drupal\Core\Cache\RefinableCacheableDependencyInterface $cacheability
     *   The cacheability metadata for the local tasks.
     *
     * @return array
     *   A render array as expected by menu-local-tasks.html.twig.
     */
    public function getTasksBuild($current_route_name, RefinableCacheableDependencyInterface &$cacheability);
    
    /**
     * Renders the local tasks (tabs) for the given route.
     *
     * @param string $route_name
     *   The route for which to make renderable local tasks.
     * @param int $level
     *   The level of tasks you ask for. Primary tasks are 0, secondary are 1.
     *
     * @return array
     *   An array containing
     *   - tabs: Local tasks render array for the requested level.
     *   - route_name: The route name for the current page used to collect the
     *     local tasks.
     *
     * @see hook_menu_local_tasks_alter()
     */
    public function getLocalTasks($route_name, $level = 0);

}