code: def test_no_duplicates(self) -> None:
      keys = [
          elt
          for elt in BENCHMARK_PROBLEM_REGISTRY.keys()
          if "MNIST" not in elt
      ]
      names = {get_problem(problem_name=key).name for key in keys}
      self.assertEqual(len(keys), len(names))
  
imports: from ax.benchmark.problems.registry import BENCHMARK_PROBLEM_REGISTRY, get_problem
  from ax.utils.common.testutils import TestCase
label_desc: Use image node_id 3 for calling the TestProblems obj's underlying member method code with example usage: obj.test_no_duplicates() without return types