code: def nnodes(self) -> int:
      raise VisualisationNotYetSupportedError(
          "nnodes()", "TensorFlow Decision Forests"
      )
  
imports: from collections import defaultdict
  from typing import List, Mapping
  import numpy
  import tensorflow_decision_forests
  from tensorflow_decision_forests.component.py_tree.node import LeafNode
  from tensorflow_decision_forests.keras import RandomForestModel
  from tensorflow_decision_forests.tensorflow.core import Task
  from dtreeviz.models.shadow_decision_tree import ShadowDecTree, VisualisationNotYetSupportedError
label_desc: Use image node_id 22 for calling the ShadowTensorflowTree obj's underlying member method code with example usage: obj.nnodes() without return types