comefrom: <doocs>1214.Two Sum BSTs_1.py
code: def inorder(root, vals):
      if root:
          inorder(root.left, vals)
          vals.append(root.val)
          inorder(root.right, vals)
masked: def sample_funcname ( var_1 , var_2 ) :
      if var_1 :
          var_0 ( var_1.left , var_2 )
          var_2.append ( var_1.val )
          var_0 ( var_1.right , var_2 )
  