public function remove(string $key)
    {
        foreach ($this->items as  &$items) {
            if ($pos = array_search($key, $items)) {
                array_splice($items, $pos, 1);
            }
        }

        return $this;
    }
public function remove(string $key)
    {
        foreach ($this->items as  &$items) {
            if ($pos = array_search($key, $items)) {
                array_splice($items, $pos, 1);
            }
        }

        return $this;
    }
public function remove ( string $ key ) { foreach ( $ this -> items as & $ items ) { if ( $ pos = array_search ( $ key , $ items ) ) { array_splice ( $ items , $ pos , 1 ) ; } } return $ this ; }
Remove cached key.

@param string $key 缓存的key

@return static
Remove cached key .