source: class ComponentChildLocatorTest {
  
      private LicketComponentContainer<?> root;
  
      @Test
      public void shouldFindChildAtNthLevelWhenCompositeIdMatchesComponentTree() {
  
target:         // given
          ComponentChildLocator locator = childLocator();
          CompositeId compositeId = fromStringValue("2:3:4:5");
  
          // when
          Optional<? extends LicketComponent<?>> rootComponent = locator.findByCompositeId(compositeId);
  
          // then
          assertThat(rootComponent.isPresent()).isTrue();
      }
  
  }