async def METHOD_NAME(self):
    # TODO: ideally we verify the resulting document with the
    # MATTR bbs-jsonld lib. This is now manually done.
    derived = await derive(
        document=BBS_SIGNED_NESTED_VC_MATTR,
        reveal_document=BBS_NESTED_VC_FULL_REVEAL_DOCUMENT_MATTR,
        suite=self.proof_suite,
        document_loader=custom_document_loader,
    )
    assert derived