public function render($writer)
{
if ($this->_id !== '') {
$writer->addAttribute('id', $this->_id);
}
if ($this->_name !== '') {
$writer->addAttribute('name', $this->_name);
}
if ($this->_httpEquiv !== '') {
$writer->addAttribute('http-equiv', $this->_httpEquiv);
}
if ($this->_scheme !== '') {
$writer->addAttribute('scheme', $this->_scheme);
}
$writer->addAttribute('content', $this->_content);
$writer->renderBeginTag('meta');
$writer->renderEndTag();
}