code: def generateTrees(self, n):
      """
      :type n: int
      :rtype: List[TreeNode]
      """
      if n == 0:
          return []
      return self.get_trees(1, n)
  
label_desc: Use image node_id 1 for calling the Solution obj's underlying member method code with example usage: obj.generateTrees(n) and returns: self, list