sortRespCtrl = canSort( sortControl, ldapResult, getDirectoryService().getSchemaManager() );
if ( sortControl.isCritical() && ( sortRespCtrl.getSortResult() != SortResultCode.SUCCESS ) )
{
ldapResult.setResultCode( ResultCodeEnum.UNAVAILABLE_CRITICAL_EXTENSION );
done.addControl( sortRespCtrl );
return new EmptyCursor<Entry>();
}
}