case 2: return new UnexpectedErrorException(error);
case 4: return new TooManyAppCallsException(error);
case 10: return new AuthorizationMissingException(error);
+ case 12: return new DeprecatedException(error);
case 17: return new TooManyUserCallsException(error);
case 21: return new PageMigratedException(error);
// 100..199: graph method errors