SimplePie::strip_htmltags

		return $this->registry->register('Content_Type_Sniffer', $class, true);
	}

	/**
	 * Set which class SimplePie uses item sources
	 */
	public function set_source_class($class = 'SimplePie_Source')
	{
		return $this->registry->register('Source', $class, true);
	}
	/**#@-*/