public function getIconVendor($class) {
		foreach ($this->_config['iconVendorPrefixes'] as $iconVendorPrefix) {
            $regex = sprintf('/^(?<!<"\')(%s[\s-]){1,}/', $iconVendorPrefix, $iconVendorPrefix);
			if (preg_match($regex, $class)) {
				return $iconVendorPrefix;
			}
		}

		return null;
	}