Radio source = harvestSource.addItem().addRadio("source");
source.addOption(hc == null, "source_normal", T_source_normal);
source.addOption(hc != null, "source_harvested", T_source_harvested);
Para buttonList = main.addPara();
buttonList.addButton("submit_save").setValue(T_submit_save);
buttonList.addButton("submit_return").setValue(T_submit_return);
main.addHidden("administrative-continue").setValue(knot.getId());
}