source: class IdGeneratorTest {
  
      private IdGenerator idGenerator;
  
      @Test
      public void testRandomUUID() {
  
target:         for (int i = 0; i < 100; i++) {
              String randomUUID = idGenerator.randomUUID();
              System.out.println("randomUUID: " + randomUUID);
          }
      }
  
  }