@Override
  public boolean isUseFileNestingRules(String paneId) {
    if (!currentState.getUseFileNestingRules()) return false;
    if (paneId == null) {
      return false;
    }
    AbstractProjectViewPane pane = idToPane.get(paneId);
    return pane != null && pane.isFileNestingEnabled();
  }
@Override
  public boolean isUseFileNestingRules(String paneId)