public static IBinaryTreeNode <TResult> Select <TItem, TResult>(
this IBinaryTreeNode <TItem> node,
Func <TItem, TResult> selector)
{
if (node == null)
{
throw new ArgumentNullException(nameof(node));
}
if (selector == null)
{
throw new ArgumentNullException(nameof(selector));
}
var visitor = new SelectBinaryTreeNodeVisitor <TItem, TResult>(selector);
return(node.Accept(visitor));
}
