}
private void init() {
unit = dialog.findUnit(getJustification());
DMRMapping DMRMapping = (DMRMapping) unit.findMapping(MappingType.DMR);
address = AddressMapping.fromString(DMRMapping.getAddress());
// check preconditions of the address token
final Set<String> requiredStatements = address.getRequiredStatements();
// any value expression key becomes a precondition matched against the statement context