@Override
    public int compareTo(@NotNull UsageGroup otherGroup) {
      int compareTexts = getPresentableGroupText().compareToIgnoreCase(otherGroup.getPresentableGroupText());
      if (compareTexts != 0) return compareTexts;
      if (otherGroup instanceof FileUsageGroup) {
        return myFile.getPath().compareTo(((FileUsageGroup)otherGroup).myFile.getPath());
      }
      return 0;
    }
@Override
    public int compareTo(@NotNull UsageGroup otherGroup)