Object rpk=rawPrimaryKeyInTransaction(); return rpk!=null ? rpk.toString() : null;
Object pk=rawPrimaryKeyInTransaction(); if(pk == null) return null; if(pk instanceof String || pk instanceof Number) { return pk.toString(); } return NSPropertyListSerialization.stringFromPropertyList(pk);
    public String primaryKeyInTransaction() {        Object rpk=rawPrimaryKeyInTransaction();        return rpk!=null ? rpk.toString() : null;    }