/**
* Sets a callable which aims to translate form labels, errors and help messages
*
* @param mixed $callable
*
* @throws InvalidArgumentException if an invalid php callable or sfCallable has been provided
*/
public static function setTranslationCallable($callable)
{
if (!$callable instanceof sfCallable && !is_callable($callable)) {
throw new InvalidArgumentException('Provided i18n callable should be either an instance of sfCallable or a valid PHP callable');
}
self::$translationCallable = $callable;
}
