code: protected void mergeContainers(LaContainer container, String path, boolean addToTail) {
          final Set<URL> additionalURLSet = gatherAdditionalDiconURLs(path, addToTail);
          for (Iterator<URL> itr = additionalURLSet.iterator(); itr.hasNext();) {
              final String url = itr.next().toExternalForm();
              if (LaContainerBuilderUtils.resourceExists(url, this)) {
                  LaContainerBuilderUtils.mergeContainer(container, LaContainerFactory.create(url));
              }
          }
      }
docs: ===============