code: def test_caching(self):
      meta = metadata.Metadata.from_raw(_RAW_EXAMPLE, validate=True)
  
      assert meta.version is meta.version
  
imports: import pathlib
  import pytest
  from packaging import metadata, requirements, specifiers, utils, version
  from packaging.metadata import ExceptionGroup
label_desc: Use image node_id 10 for calling the TestMetadata obj's underlying member method code with example usage: obj.test_caching() without return types