docs: private void updateStatsTree() {
          if (myStatsWithChildren == null)
              return;
  
          ArrayList colMembers = myStatsWithChildren.subCollections();
          if (colMembers == null)
              return;
  
          colMembers.clear();
  
          // getStats from children
          ModuleItem[] items = children();
          if (items != null) {
              for (int i = 0; i < items.length; i++)
                  colMembers.add(items[i].getStats(true));
          }
      }