/**
* Gets a TokenParser suitable for a tag.
*
* @param string $tag A tag name
*
* @return null|Twig_TokenParserInterface A Twig_TokenParserInterface or null if no suitable TokenParser was found
*/
public function getTokenParser($tag)
{
if ($this->environment->getFunction($tag)) {
return $this->viewHelperParser;
}
return null;
}
