code: def test_entity_relations(self):
      with self.repo.structured_db as db:
          db.create_experiment("my experiment")
          runs = [db.create_run(generate_run_hash()) for _ in range(10)]
          for run in runs:
              run.experiment = "my experiment"
  
      for run in runs:
          self.assertEqual("my experiment", run.experiment_obj.name)
          self.assertEqual(10, len(run.experiment_obj.runs))
  
imports: from tests.base import PrefilledDataTestBase
  from aim.sdk.utils import generate_run_hash
label_desc: Use image node_id 2 for calling the TestStructuredDatabase obj's underlying member method code with example usage: obj.test_entity_relations() without return types