public List<CallGraphViewData> getCallGraphViewsData() {
    final ArrayList<CallGraphViewData> callGraphViews = new ArrayList<>();

    for (final ViewData viewData : views) {
      if (viewData instanceof CallGraphViewData) {
        callGraphViews.add((CallGraphViewData) viewData);
      }
    }
    return callGraphViews;
  }
Contains view data for each opened view of a Diff object.
java/ui/src/main/java/com/google/security/zynamics/bindiff/project/userview/ViewManager.java