public function _doCodeBlocks_callback($matches)
	{
		$codeblock = $this->outdent($matches[1]);
		if(($codeblock = $this->highlightCodeBlock($codeblock)) !== null)
			return "\n\n".$this->hashBlock($codeblock)."\n\n";
		else
			return parent::_doCodeBlocks_callback($matches);
	}