comefrom: <garvit244>144_2.py
code: def recursive(root, result):
      if not root:
          return 
      result.append(root.val)
      recursive(root.left, result)
      recursive(root.right, result)
masked: def sample_funcname ( var_1 , var_2 ) :
      if not var_1 :
          return
      var_2.append ( var_1.val )
      var_0 ( var_1.left , var_2 )
      var_0 ( var_1.right , var_2 )
  