@Override
        public void pluginUnloaded(@NotNull IdeaPluginDescriptor pluginDescriptor, boolean isUpdate) {
          Set<ProjectSystemId> availableES = new HashSet<>();
          for (ExternalSystemManager<?, ?, ?, ?, ?> manager : ExternalSystemManager.EP_NAME.getExtensionList()) {
            ProjectSystemId id = manager.getSystemId();
            availableES.add(id);
          }

          Iterator<ExternalProjectsView> iterator = myProjectsViews.iterator();
          while (iterator.hasNext()) {
            ExternalProjectsView view = iterator.next();
            if (!availableES.contains(view.getSystemId())) {
              iterator.remove();
            }
            if (view instanceof Disposable) {
              Disposer.dispose((Disposable)view);
            }
          }
        }
@Override
        public void pluginUnloaded(@NotNull IdeaPluginDescriptor pluginDescriptor, boolean isUpdate)