code: @Override
  	public void clearChildren() {
  		super.clearChildren();
  		for (CuckooHashing<List<ClusteringTreeNode>> bucket : this.buckets) {
  			bucket.clear();
  		}
  	}
docs: /*
  (non-Javadoc)
  
  @see moa.evaluation.bico.ClusteringTreeNode#clearChildren()