out.writeInt(type);
out.writeByte(type);
        public void writeExternal(ObjectOutput out) throws IOException {            out.writeInt(type);            out.writeLong(id);            out.writeBoolean(rsp_expected);            if(corrName != null) {                out.writeBoolean(true);                out.writeUTF(corrName);            }            else {                out.writeBoolean(false);            }            out.writeObject(callStack);            out.writeObject(dest_mbrs);        }