public function head()
    {
        $output = [
            'meta'             => $this->_View->fetch('meta'),
            'assets'           => $this->assets('css'),
            'fetch_css'        => $this->_View->fetch('css'),
            'fetch_css_bottom' => $this->_View->fetch('css_bottom'),
        ];

        return implode('', $output);
    }