code: def test_impala(self):
      check_support(
          "IMPALA", {"num_workers": 1, "num_gpus": 0}, test_eager=True
      )
  
imports: import unittest
  import ray
  from ray import air
  from ray import tune
  from ray.rllib.utils.framework import try_import_tf
  from ray.tune.registry import get_trainable_cls
label_desc: Use image node_id 6 for calling the TestEagerSupportPolicyGradient obj's underlying member method code with example usage: obj.test_impala() without return types