code: def feature_importances_(self):
      raise NotImplementedError
  
imports: from abc import ABCMeta, abstractmethod
  from ..base import BaseEstimator, ClassifierMixin, MultiOutputMixin
  import copy
  from ._criterion import Gini, Criterion
  from ._splitter import BestSplitter, Splitter
  from ._tree import DepthFirstTreeBuilder, Tree
  import ivy
  import numbers
label_desc: Use image node_id 9 for calling the BaseDecisionTree obj's underlying member method code with example usage: obj.feature_importances_() without return types