code: @Override
      public void openAllEquivalences() throws ResourceDownloadError,
              IndexingFailure, IOException {
          if (hasItems(resourceIndex.getEquivalenceResources())) {
              // open all equivalences that are not already open
              for (Equivalence eqResource : resourceIndex
                      .getEquivalenceResources()) {
  
                  if (!openEquivalences.containsKey(eqResource
                          .getNamespaceResourceLocation().getResourceLocation())) {
                      openEquivalence(eqResource);
                  }
              }
          }
      }
docs: {@inheritDoc}