ding callback for a given binding.
     *
     * @param  string  $key
     * @return \Closure|null
     */
    public function getBindingCallback($key)
    {
        if (isset($this->binders[$key = str_replace('-', '_', $key)])) {
            return $this->binders[$key];
        }
    }

    /**
     * Get the global "where" patterns.
     *
     * @return array
     */
    public function getPatterns()
    {
        return $this->patterns;
    }

    /**
     * Set a global where pattern on all routes.
     *
     * @param  string  $key
     * @param  string  $pattern
     * @return void
     */
    public function pattern($key, $pattern)
    {
        $this->patterns[$key] = $pattern;
    }

    /**
     * Set a group of global where patterns on all routes.
     *
     * @param  array  $patterns
     * @return void
     */
    public function patterns($patterns)
    {
        foreach ($patterns as $key => $pattern) {
            $this->pattern($key, $pattern);
        }
    }

    /**
     * Determine if the router currently has a group stack.
     *
     * @return bool
     */
    public function hasGroupStack()
    {
        return ! empty($this->groupStack);
    }

    /**
     * Get the current group stack for the router.
     *
     * @return array
     */
    public function getGroupStack()
    {
        return $this->groupStack;
    }

    /**
     * Get a route parameter for the current route.
     *
     * @param  string  $key
     * @param  string|null  $default
     * @return mixed
     */
    public function input($key, $default = null)
    {
        return $this->current()->parameter($key, $default);
    }

    /**
     * Get the request currently being dispatched.
     *
     * @return \Illuminate\Http\Request
     */
    public function getCurrentRequest()
    {
        return $this->currentRequest;
    }

    /**
     * Get the currently dispatched route instance.
     *
     * @return \Illuminate\Routing\Route|null
     */
    public function getCurrentRoute()
    {
        return $this->current();
    }

    /**
     * Get the currently dispatched route instance.
     *
     * @return \Illuminate\Routing\Route|null
     */
    public function current()
    {
        return $this->current;
    }

    /**
     * Check if a route with the given name exists.
     *
     * @param  string  $name
     * @return bool
     */
    public function has($name)
    {
        $names = is_array($name) ? $name : func_get_args();

        foreach ($names as $value) {
            if (! $this->routes->hasNamedRoute($value)) {
                return false;
            }
        }

        return true;
    }

    /**
     * Get the current route name.
     *
     * @return string|null
     */
    public function currentRouteName()
    {
        return $this->current() ? $this->current()->getName() : null;
    }

    /**
     * Alias for the "currentRouteNamed" method.
     *
     * @param  mixed  ...$patterns
     * @return bool
     */
    public function is(...$patterns)
    {
        return $this->currentRouteNamed(...$patterns);
    }

    /**
     * Determine if the current route matches a pattern.
     *
     * @param  mixed  ...$patterns
     * @return bool
     */
    public function currentRouteNamed(...$patterns)
    {
        return $this->current() && $this->current()->named(...$patterns);
    }

    /**
     * Get the current route action.
     *
     * @return string|null
     */
    public function currentRouteAction()
    {
        if ($this->current()) {
            return $this->current()->getAction()['controller'] ?? null;
        }
    }

    /**
     * Alias for the "currentRouteUses" method.
     *
     * @param  array  ...$patterns
     * @return bool
     */
    public function uses(...$patterns)
    {
        foreach ($patterns as $pattern) {
            if (Str::is($pattern, $this->currentRouteAction())) {
                return true;
            }
        }

        return false;
    }

    /**
     * Determine if the current route action matches a given action.
     *
     * @param  string  $action
     * @return bool
     */
    public function currentRouteUses($action)
    {
        return $this->currentRouteAction() == $action;
    }

    /**
     * Set the unmapped global resource parameters to singular.
     *
     * @param  bool  $singular
     * @return void
     */
    public function singularResourceParameters($singular = true)
    {
        ResourceRegistrar::singularParameters($singular);
    }

    /**
     * Set the global resource parameter mapping.
     *
     * @param  array  $parameters
     * @return void
     */
    public function resourceParameters(array $parameters = [])
    {
        ResourceRegistrar::setParameters($parameters);
    }

    /**
     * Get or set the verbs used in the resource URIs.
     *
     * @param  array  $verbs
     * @return array|null
     */
    public function resourceVerbs(array $verbs = [])
    {
        return ResourceRegistrar::verbs($verbs);
    }

    /**
     * Get the underlying route collection.
     *
     * @return \Illuminate\Routing\RouteCollectionInterface
     */
    public function getRoutes()
    {
        return $this->routes;
    }

    /**
     * Set the route collection instance.
     *
     * @param  \Illuminate\Routing\RouteCollection  $routes
     * @return void
     */
    public function setRoutes(RouteCollection $routes)
    {
        foreach ($routes as $route) {
            $route->setRouter($this)->setContainer($this->container);
        }

        $this->routes = $routes;

        $this->container->instance('routes', $this->routes);
    }

    /**
     * Set the compiled route collection instance.
     *
     * @param  array  $routes
     * @return void
     */
    public function setCompiledRoutes(array $routes)
    {
        $this->routes = (new CompiledRouteCollection($routes['compiled'], $routes['attributes']))
            ->setRouter($this)
            ->setContainer($this->container);

        $this->container->instance('routes', $this->routes);
    }

    /**
     * Remove any duplicate middleware from the given array.
     *
     * @param  array  $middleware
     * @return array
     */
    public static function uniqueMiddleware(array $middleware)
    {
        $seen = [];
        $result = [];

        foreach ($middleware as $value) {
            $key = \is_object($value) ? \spl_object_id($value) : $value;

            if (! isset($seen[$key])) {
                $seen[$key] = true;
                $result[] = $value;
            }
        }

        return $result;
    }

    /**
     * Set the container instance used by the router.
     *
     * @param  \Illuminate\Container\Container  $container
     * @return $this
     */
    public function setContainer(Container $container)
    {
        $this->container = $container;

        return $this;
    }

    /**
     * Dynamically handle calls into the router instance.
     *
     * @param  string  $method
     * @param  array  $parameters
     * @return mixed
     */
    public function __call($method, $parameters)
    {
        if (static::hasMacro($method)) {
            return $this->macroCall($method, $parameters);
        }

        if ($method === 'middleware') {
            return (new RouteRegistrar($this))->attribute($method, is_array($parameters[0]) ? $parameters[0] : $parameters);
        }

        return (new RouteRegistrar($this))->attribute($method, array_key_exists(0, $parameters) ? $parameters[0] : true);
    }
}