class OnHeapLevelIndexHeader implements LevelIndexHeader {

	@Override
	public void updateNextNode(int level, long node) {
		Preconditions.checkArgument(level >= 0 && level <= topLevel,
			"invalid level " + level + " current top level is " + topLevel);

		if (level == 0) {
			nextNode = node;
		} else {
			levelIndex[level - 1] = node;
		}
	}

	  OnHeapLevelIndexHeader();
	private  OnHeapLevelIndexHeader(int maxLevel);

}