docs: Instance getNearestGCRootPointer(Instance instance) {
          if (heap.getGCRoot(instance) != null) {
              return instance;
          }
          computeGCRoots();
          long nextGCPathId = heap.idToOffsetMap.get(instance.getInstanceId()).getNearestGCRootPointer();
          return heap.getInstanceByID(nextGCPathId);
      }