OrderExtensionService extends OpenmrsService {
  OrderSet getOrderSet(Integer id);
  OrderSet getOrderSetByUuid(String uuid);
  List<OrderSet> getNamedOrderSets(boolean includeRetired);
  List<OrderSet> findAvailableOrderSets(String partialName, Concept indication);
  OrderSet saveOrderSet(OrderSet orderSet);
  void purgeOrderSet(OrderSet orderSet);
  OrderSetMember getOrderSetMember(Integer id);
  List<OrderSet> getParentOrderSets(OrderSet orderSet);
  <T extends OrderGroup> T saveOrderGroup(T orderGroup);
  <T extends OrderGroup> List<T> getOrderGroups(Patient patient, Class<T> type);
  void addOrdersForPatient(Patient patient, OrderSet orderSet, Date startDate, Integer numCycles);
  OrderGroup getOrderGroup(Integer id);
  DrugRegimen getDrugRegimen(Integer id);
  Integer getMaxNumberOfCyclesForRegimen(Patient patient, DrugRegimen regimen);
  List<ExtendedDrugOrder> getFutureDrugOrdersOfSameOrderSet(Patient patient, OrderSet orderSet, Date startDate);
  List<DrugRegimen> getFutureDrugRegimensOfSameOrderSet(Patient patient, DrugRegimen drugRegimen, Date startDate);
  List<ExtendedDrugOrder> getExtendedDrugOrders(Patient patient, Concept indication, Date startDateAfter, Date startDateBefore);
}