code: def _best_split(self, X, y):
      return best_split(self, X, y)
  
imports: import numpy
  import ray
  from sklearn import datasets, metrics
  import time
  import tempfile
  import os
  import json
label_desc: Use image node_id 6 for calling the DecisionTreeClassifier obj's underlying member method code with example usage: obj._best_split(X, y) and returns: best_split