public function getRunkit()
{
if (is_null($this->_runkit)) {
if (!in_array('runkit', get_loaded_extensions())) {
throw new \Mutagenesis\FUTException('Runkit extension is not loaded. Unfortunately, runkit' . ' is essential for Mutagenesis. Please see the manual or' . ' README which explains how to install an updated runkit' . ' extension suitable for Mutagenesis and PHP 5.3.');
}
$this->_runkit = new \Mutagenesis\Utility\Runkit();
}
return $this->_runkit;
}