protected function pushMiddleware($middleware, string $key = "", string $group = null)
    {
        $middleware = $this->middlewareResolver()->resolveOrFail($middleware, $key);
        $this->getMiddlewareGroup($group ?: $this->middlewareGroupId)->put($key, $middleware);
        return $this;
    }
protected function pushMiddleware($middleware, string $key = "", string $group = null)
    {
        $middleware = $this->middlewareResolver()->resolveOrFail($middleware, $key);
        $this->getMiddlewareGroup($group ?: $this->middlewareGroupId)->put($key, $middleware);
        return $this;
    }
protected function pushMiddleware ( $ middleware , string $ key = "" , string $ group = null ) { $ middleware = $ this -> middlewareResolver ( ) -> resolveOrFail ( $ middleware , $ key ) ; $ this -> getMiddlewareGroup ( $ group ? : $ this -> middlewareGroupId ) -> put ( $ key , $ middleware ) ; return $ this ; }
Add a new middleware to end of the stack if it does not already exist.

@param mixed $middleware
@param string $key
@param string|null $group
@return $this
Add a new middleware to end of the stack if it does not already exist .