Cake\View\Helper\HtmlHelper::charset PHP Method

    public function charset($charset = null)
    {
        if (empty($charset)) {
            $charset = strtolower(Configure::read('App.encoding'));
        }
        return $this->formatTemplate('charset', ['charset' => !empty($charset) ? $charset : 'utf-8']);
    }

 /**
  * Returns a charset META-tag.
  *
  * @param null $charset
  * @return string
  */
 public function charset($charset = null)
 {
     return parent::charset($charset) . $this->Document->eol;
 }