code: public QuickWidget findWidgetByPosition(QuickWidgetType type, int windowId, int row, int column) {
      return desktopWindowManager.getQuickWidgetByPos(type, windowId, row, column);
    }
docs: Finds widget by specified position. Used for widgets that have a position only, e.g.
  treeviewitems and tabs.
  
  @param windowId id of parent window
  @param row      row of widget within its parent
  @param column   column of widget within its parent
  @return QuickWidget matching, or null if no matching widget is found