@Override
  public String getPercentage(int columnIdx, @NotNull AbstractTreeNode<?> node) {
    VirtualFile file = extractFile(node);
    if (file == null) return null;
    if (file.isDirectory()) {
      return myAnnotator.getDirCoverageInformationString(myProject, file, mySuitesBundle, myCoverageDataManager);
    }
    else {
      return myAnnotator.getFileCoverageInformationString(myProject, file, mySuitesBundle, myCoverageDataManager);
    }
  }
@Override
  public String getPercentage(int columnIdx, @NotNull AbstractTreeNode<?> node)