code: def test_kneighbors_classifer(self):
      self._test_kneighbors_classifier()
  
imports: import unittest
  from packaging.version import Version, parse
  import numpy
  import sklearn
  import torch
  from sklearn.neighbors import KNeighborsClassifier, KNeighborsRegressor
  from sklearn import datasets
  import hummingbird.ml
label_desc: Use image node_id 2 for calling the TestSklearnKNeighbors obj's underlying member method code with example usage: obj.test_kneighbors_classifer() without return types