public final class Solution
Example: var ti = TreeNode(5) var v = ti.val Definition for a binary tree node. class TreeNode(var val: Int) { var left: TreeNode? = null var right: TreeNode? = null }
val
Solution()
final TreeNode
pruneTree(TreeNode root)
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
final TreeNode pruneTree(TreeNode root)