code: def __repr__(self):
      return "gain: {}, split {}".format(self.gain, self.split)
  
imports: import numpy
  import pandas
  from fate.arch import Context
  from fate.arch.dataframe import DataFrame
  from fate.ml.ensemble.learner.decision_tree.tree_core.splitter import SplitInfo
  from typing import List
  import logging
label_desc: Use image node_id 4 for calling the FeatureImportance obj's underlying member method code with example usage: obj.__repr__() and returns: str