code: def test_resolve_dict(self):
      config = {
          "a": {
              "b": 1,
              "c": 2,
          },
          "b": {"a": 3},
      }
      resolved = _resolve_nested_dict(config)
      for k, v in [(("a", "b"), 1), (("a", "c"), 2), (("b", "a"), 3)]:
          self.assertEqual(resolved.get(k), v)
  
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 14 for calling the VariantGeneratorTest obj's underlying member method code with example usage: obj.test_resolve_dict() without return types