code: def test_objectmapper(self):
      df = pdml.ModelFrame([])
      self.assertIs(
          df.neighbors.NearestNeighbors, neighbors.NearestNeighbors
      )
      self.assertIs(
          df.neighbors.KNeighborsClassifier,
          neighbors.KNeighborsClassifier,
      )
      self.assertIs(
          df.neighbors.RadiusNeighborsClassifier,
          neighbors.RadiusNeighborsClassifier,
      )
      self.assertIs(
          df.neighbors.KNeighborsRegressor,
          neighbors.KNeighborsRegressor,
      )
      self.assertIs(
          df.neighbors.RadiusNeighborsRegressor,
          neighbors.RadiusNeighborsRegressor,
      )
      self.assertIs(
          df.neighbors.NearestCentroid, neighbors.NearestCentroid
      )
      self.assertIs(df.neighbors.BallTree, neighbors.BallTree)
      self.assertIs(df.neighbors.KDTree, neighbors.KDTree)
      self.assertIs(
          df.neighbors.DistanceMetric, neighbors.DistanceMetric
      )
      self.assertIs(df.neighbors.KernelDensity, neighbors.KernelDensity)
  
file_path: pandas-ml/pandas_ml/skaccessors/test/test_neighbors.py
imports: import pytest
  import sklearn.datasets
  import sklearn.neighbors
  import pandas_ml
  import pandas_ml.util.testing
label_desc: Use image node_id 1 for calling the TestNeighbors obj's underlying member method code with example usage: obj.test_objectmapper() without return types