How to use the artifacts.reader.YamlArtifactsReader function in artifacts

def _CreateTestArtifactDefinitionsFiltersHelper(self, knowledge_base):
    """Creates an artifact definitions filters helper for testing.

    Args:
      knowledge_base (KnowledgeBase): contains information from the source
          data needed for filtering.

    Returns:
      ArtifactDefinitionsFiltersHelper: artifact definitions filters helper.

    Raises:
      SkipTest: if the path inside the test data directory does not exist and
          the test should be skipped.
    """
    registry = artifacts_registry.ArtifactDefinitionsRegistry()
    reader = artifacts_reader.YamlArtifactsReader()

    test_artifacts_path = self._GetTestFilePath(['artifacts'])
    self._SkipIfPathNotExists(test_artifacts_path)

    registry.ReadFromDirectory(reader, test_artifacts_path)

    return artifact_filters.ArtifactDefinitionsFiltersHelper(
        registry, knowledge_base)