@Override
  public List<AbstractTreeNode<?>> getChildrenNodes(AbstractTreeNode node) {
    List<AbstractTreeNode<?>> children = new ArrayList<>();
    if (node instanceof CoverageListNode) {
      final Object val = node.getValue();
      if (val instanceof PsiFile || val == null) return Collections.emptyList();
      final PsiDirectory psiDirectory = (PsiDirectory)val;
      final PsiDirectory[] subdirectories = ReadAction.compute(() -> psiDirectory.getSubdirectories());
      for (PsiDirectory subdirectory : subdirectories) {
        if (myAnnotator.getDirCoverageInformationString(subdirectory, mySuitesBundle, myCoverageDataManager) == null) continue;
        CoverageListNode e = new CoverageListNode(myProject, subdirectory, mySuitesBundle);
        if (!e.getChildren().isEmpty()) {
          children.add(e);
        }
      }
      final PsiFile[] psiFiles = ReadAction.compute(() -> psiDirectory.getFiles());
      for (PsiFile psiFile : psiFiles) {
        if (myAnnotator.getFileCoverageInformationString(psiFile, mySuitesBundle, myCoverageDataManager) == null) continue;
        CoverageListNode e = new CoverageListNode(myProject, psiFile, mySuitesBundle);
        VirtualFile file = e.getFile();
        CoverageViewManager.StateBean stateBean = CoverageViewManager.getInstance(myProject).getStateBean();
        ModifiedFilesFilter filter = myAnnotator.getModifiedFilesFilter();
        if (!stateBean.isShowOnlyModified() || file == null || filter == null || filter.isFileModified(file)) {
          children.add(e);
        }
      }
    }
    return children;
  }
@Override
  public List<AbstractTreeNode<?>> getChildrenNodes(AbstractTreeNode node)