VmAbstractHeap heap = heapManager.getFirstHeap();
VmAbstractHeap heap = heapManager.getHeapList();
    private final void runFinalization() {        VmAbstractHeap heap = heapManager.getFirstHeap();        while (heap != null) {            visitor.setCurrentHeap(heap);            heap.walk(visitor, true, ObjectFlags.GC_COLOUR_MASK, ObjectFlags.GC_YELLOW);            heap = heap.getNext();        }    }