How to find Closest value in BST : Coding Interview Question

Don't click this: https://bit.ly/3cmuoAn Find Closest Value In BST. Write a function that takes in a Binary Search Tree (BST) and a target integer value and returns the closest value to that target value contained in the BST. You can assume that there will only be one closest value. Each BST node has an integer value, a left child node, and a right child node.