/**
* Returns a url for a gravatar for a given hash
*
* @param string $hash
* @param integer $size
* @param string $rating
* @param string $default
* @return string
*/
public function getUrlForHash($hash, $size = null, $rating = null, $default = null)
{
return $this->api->getUrlForHash($hash, $size, $rating, $default);
}
