Sequence xdr = null;

            if (cdr_payload.a.isInitialized) {
                xdr = cdr_payload.a;
            } else if (cdr_payload.gb.isInitialized) {
                xdr = cdr_payload.gb;
            } else if (cdr_payload.iucs.isInitialized) {
                xdr = cdr_payload.iucs;
            } else if (cdr_payload.iups.isInitialized) {
                xdr = cdr_payload.iups;
            } else if (cdr_payload.inap.isInitialized) {
                xdr = cdr_payload.inap;
            } else if (cdr_payload.gnLegal.isInitialized) {
                xdr = cdr_payload.gnLegal;
            } else if (cdr_payload.gnGp.isInitialized) {
                xdr = cdr_payload.gnGp;
            } else if (cdr_payload.map.isInitialized) {
                xdr = cdr_payload.map;
            }