text: /*
   * @lc app=leetcode.cn id=407 lang=javascript
   *
   * [407] 接雨水 II
   */
  
  // @lc code=start
  /**
   * @param {number[][]} heightMap
   * @return {number}
   */
  var trapRainWater = function(heightMap) {
  
  };
  // @lc code=end
  
  //* Testcase Example: '[[1,4,3,1,3,2],[3,2,1,3,2,4],[2,3,3,2,3,1]]'