private static @NotNull String format(@NotNull String prefix) {
    for (StackTraceElement element : new Exception().getStackTrace()) {
      if (!StructureTreeModel.class.getName().equals(element.getClassName())) {
        return prefix + " @ " + element.getFileName() + " : " + element.getLineNumber();
      }
    }
    return prefix;
  }
private static @NotNull String format(@NotNull String prefix)