@Override
      public @NotNull MyState saveState(@NotNull ChangesTree tree) {
        ChangesBrowserNode<?> oldRoot = tree.getRoot();
        TreeState state = TreeState.createOn(tree, oldRoot);
        state.setScrollToSelection(false);
        return new MyState(state, oldRoot.getFileCount());
      }
@Override
      public @NotNull MyState saveState(@NotNull ChangesTree tree)