code: @Override
    public void validateAllocator() {
      if (topSize < 0) {
        return;
      }
      traverseAndCheck();
      for (int i = 0; i < smallBins.length; i++) {
        checkSmallBin(i);
      }
      for (int i = 0; i < treeBins.length; i++) {
        checkTreeBin(i);
      }
    }
docs: Debugging Support *