code: def test_fit_and_evaluate_horovod(self):
      self.impl_test_fit_and_evaluate(backend="horovod")
  
imports: import shutil
  from unittest import TestCase
  import numpy
  import pytest
  import tensorflow
  from zoo import init_nncontext
  from zoo.orca.data import XShards
  import zoo.orca.data.pandas
  from zoo.orca.learn.tf2 import Estimator
  from zoo.ray import RayContext
  import ray
  import os
label_desc: Use image node_id 3 for calling the TestTFRayEstimator obj's underlying member method code with example usage: obj.test_fit_and_evaluate_horovod() without return types