internal static IEnumerable <LeafCellTreeNode> GetLeaves(CellTreeNode node)
{
LeafVisitor visitor = new LeafVisitor();
return(node.Accept <bool, IEnumerable <LeafCellTreeNode> >(visitor, true));
}
// effects: Gets all the leaves in this
internal IEnumerable <LeafCellTreeNode> GetLeafNodes()
{
return(LeafVisitor.GetLeaves(this));
}