FinalMappings implements IFinalMapping { synchronized public static FinalMappings getInstance() { if (instance == null) { instance = new FinalMappings(); } return instance; } protected  FinalMappings(); synchronized static FinalMappings getInstance(); @Override synchronized void add(Map<Integer, Integer> mapping); @Override synchronized final void set(List<Map<Integer, Integer>> list); @Override synchronized Iterator<Map<Integer, Integer>> getIterator(); @Override synchronized void clear(); @Override synchronized List<Map<Integer, Integer>> getFinalMapping(); @Override synchronized int getSize();  }
@Test public void testGetInstance() { FinalMappings result = FinalMappings.getInstance(); assertNotNull(result); }