void incrementUsageCount(int i) {
    ThreadingAssertions.assertEventDispatchThread();
    GroupNode groupNode = this;
    while (true) {
      groupNode.myRecursiveUsageCount += i;
      TreeNode parent = groupNode.getParent();
      if (!(parent instanceof GroupNode)) return;
      groupNode = (GroupNode)parent;
    }
  }
void incrementUsageCount(int i)