A tree node of haxe.ds.BalancedTree.
haxe.ds.BalancedTree
@:value({ h : -1 })new(l:TreeNode<K, V>, k:K, v:V, r:TreeNode<K, V>, h:Int = -1)
key:K
left:TreeNode<K, V>
right:TreeNode<K, V>
value:V
inlineget_height():Int