method BinarySearchTreeNode.prototype.setLeftRe-exportimport { BinarySearchTreeNode } from "https://deno.land/x/masx200_leetcode_test@8.0.2/deps.ts"; setLeft(left?: BinarySearchTreeNode<T>): BinarySearchTreeNode<T>Parametersoptionalleft: BinarySearchTreeNode<T>ReturnsBinarySearchTreeNode<T>