code: def _get_node_value(self, node_index: int) -> float:
      # self._tree.value: sklearn.tree._tree.Tree.value has
      # the shape (node_count, n_outputs, max_n_classes)
      return float(self._tree.value[node_index].reshape(-1)[0])
  
imports: from __future__ import annotations
  from functools import lru_cache
  import itertools
  from typing import List
  from typing import Set
  from typing import Tuple
  from typing import TYPE_CHECKING
  from typing import Union
  import numpy
label_desc: Use image node_id 15 for calling the _FanovaTree obj's underlying member method code with example usage: obj._get_node_value(node_index) and returns: float