ControllerResolverInterface.php

<?php

namespace Drupal\Core\Controller;

use Symfony\Component\HttpKernel\Controller\ControllerResolverInterface as BaseControllerResolverInterface;

/**
 * Extends the ControllerResolverInterface from symfony.
 */
interface ControllerResolverInterface extends BaseControllerResolverInterface {
    
    /**
     * Returns the Controller instance with a given controller route definition.
     *
     * As several resolvers can exist for a single application, a resolver must
     * return false when it is not able to determine the controller.
     *
     * @param mixed $controller
     *   The controller attribute like in $request->attributes->get('_controller')
     *
     * @return mixed|bool
     *   A PHP callable representing the Controller, or false if this resolver is
     *   not able to determine the controller
     *
     * @throws \InvalidArgumentException|\LogicException
     *   Thrown if the controller can't be found.
     *
     * @see \Symfony\Component\HttpKernel\Controller\ControllerResolverInterface::getController()
     */
    public function getControllerFromDefinition($controller);

}