--- /dev/null
+<?php
+
+namespace Drupal\Core\Menu;
+
+use Drupal\Component\Plugin\PluginManagerInterface;
+use Drupal\Core\Cache\RefinableCacheableDependencyInterface;
+
+/**
+ * Manages discovery and instantiation of menu local task plugins.
+ *
+ * This manager finds plugins that are rendered as local tasks (usually tabs).
+ * Derivatives are supported for modules that wish to generate multiple tabs on
+ * behalf of something else.
+ */
+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);
+
+}