code: def is_leaf(self):
      return len(self.children) == 0
  
imports: import copy
  from typing import Any
  from typing import Dict
  from typing import List
  from typing import Optional
  import keras_tuner
  import numpy
  from autokeras.engine import tuner
label_desc: Use image node_id 2 for calling the TrieNode obj's underlying member method code with example usage: obj.is_leaf() and returns: unknown