code: def test_accept_create_dataset_without_created_by():
      ds = Dataset(
          name="a-dataset",
          id=uuid.uuid4(),
          task=TaskType.text_classification,
          owner="dd",
          workspace="dd",
          created_at=datetime.datetime.utcnow(),
          last_updated=datetime.datetime.utcnow(),
      )
  
      assert ds
      assert ds.created_by is None
  
file_path: argilla/tests/unit/server/models/old_models/test_datasets.py
imports: import datetime
  import uuid
  import pytest
  from argilla.server.commons.models import TaskType
  from argilla.server.daos.models.datasets import BaseDatasetDB
  from argilla.server.schemas.v0.datasets import CreateDatasetRequest, Dataset
  from tests.pydantic_v1 import ValidationError
label_desc: Use image node_id 5 for calling a global function with example usage: test_accept_create_dataset_without_created_by() without return types