private void updateRegisteredActions() {
    final Project project = getProject();
    if (project.isDisposed()) {
      return;
    }
    final List<Pair<String, AnAction>> actionList = new ArrayList<>();
    for (final AntBuildFileBase buildFile : myBuildFiles) {
      final AntBuildModelBase model = buildFile.getModel();
      String defaultTargetActionId = model.getDefaultTargetActionId();
      if (defaultTargetActionId != null) {
        final TargetAction action = new TargetAction(
          buildFile, TargetAction.getDefaultTargetName(), Collections.singletonList(TargetAction.getDefaultTargetName()), null
        );
        actionList.add(new Pair<>(defaultTargetActionId, action));
      }

      collectTargetActions(model.getFilteredTargets(), actionList, buildFile);
      collectTargetActions(getMetaTargets(buildFile), actionList, buildFile);
    }

    //noinspection SynchronizeOnThis
    synchronized (this) {
      // unregister Ant actions
      ActionManagerEx actionManager = ActionManagerEx.getInstanceEx();
      for (String oldId : actionManager.getActionIdList(AntConfiguration.getActionIdPrefix(project))) {
        actionManager.unregisterAction(oldId);
      }
      if (!actionList.isEmpty()) {
        final Set<String> registeredIds = new HashSet<>();
        for (Pair<String, AnAction> pair : actionList) {
          if (!registeredIds.contains(pair.first)) {
            registeredIds.add(pair.first);
            actionManager.registerAction(pair.first, pair.second);
          }
        }
      }
    }
  }
private void updateRegisteredActions()