code: def testRecursiveDep(self):
      try:
          list(
              self.generate_trials(
                  {
                      "run": "PPO",
                      "config": {
                          "foo": tune.sample_from(
                              lambda spec: spec.config.foo
                          ),
                      },
                  },
                  "recursive_dep",
              )
          )
      except RecursiveDependencyError as e:
          assert "`foo` recursively depends on" in str(e), e
      else:
          raise
  
imports: import os
  import numpy
  import random
  import unittest
  import ray
  from ray.rllib import _register_all
  from ray import tune
  from ray.tune.result import DEFAULT_RESULTS_DIR
  from ray.tune.search import grid_search, BasicVariantGenerator
  from ray.tune.search.variant_generator import RecursiveDependencyError, _resolve_nested_dict
label_desc: Use image node_id 15 for calling the VariantGeneratorTest obj's underlying member method code with example usage: obj.testRecursiveDep() without return types