@dataclass_json
@dataclass
class InnerDC:
    subfield: str
    subpath: str


@dataclass_json
@dataclass
class OuterDC:
    name: str
    path: str
    inner_dc: InnerDC
    uid: Optional[int] = None


@task
def make_test_dc(name: str, path: str, subfield: str, subpath: str) -> OuterDC:
    return OuterDC(name=name, path=path, inner_dc=InnerDC(subfield=subfield, subpath=subpath))


@task
def extract_subpath(dc: OuterDC) -> str:
    return dc.inner_dc.subpath


@workflow
def wf(name: str, path: str, subfield: str, subpath: str) -> str:
    dc = make_test_dc(name=name, path=path, subfield=subfield, subpath=subpath)
    return extract_subpath(dc=dc)