code: def test_get_initial_version():
      SimpleDateAssetsVersioningSystem.check_version_valid(
          SimpleDateAssetsVersioningSystem.get_initial_version()
      )
  
imports: import json
  import os
  import time
  import pytest
  from test_major_minor_versioning import get_string_spec
  import modelkit
  import tests
  from modelkit.assets import errors
  from modelkit.assets.settings import AssetSpec
  from modelkit.assets.versioning.simple_date import SimpleDateAssetsVersioningSystem
label_desc: Use image node_id 2 for calling a global function with example usage: test_get_initial_version() without return types