/**
* Compare preferences alphabetically
*
* @param MatchedPreferenceInterface $lValue
* @param MatchedPreferenceInterface $rValue
*
* @return int -1, 0, 1 (see usort() callback for meaning)
*/
private function compareVariant(MatchedPreferenceInterface $lValue, MatchedPreferenceInterface $rValue)
{
return strcasecmp($lValue->getVariant(), $rValue->getVariant());
}
