src/Http/Cookie.php
public function get($key = null)
    {
        return (is_null($key) ? $_COOKIE : ($this->has($key) ? $_COOKIE[$key] : null));
    }
public function get($key = null)
    {
        return (is_null($key) ? $_COOKIE : ($this->has($key) ? $_COOKIE[$key] : null));
    }
Get cookie method.

@param string $key

@return null|mixed