def METHOD_NAME(self) -> Iterable[OwnershipClass]:
    owners = set([builder.make_user_urn(owner) for owner in self.owners]) | set(
        [builder.make_group_urn(owner) for owner in self.group_owners]
    )
    ownership = OwnershipClass(
        owners=[
            OwnerClass(
                owner=urn,
                type=OwnershipTypeClass.DEVELOPER,
                source=OwnershipSourceClass(
                    type=OwnershipSourceTypeClass.SERVICE,
                    # url=dag.filepath,
                ),
            )
            for urn in (owners or [])
        ],
        lastModified=AuditStampClass(
            time=0,
            actor=builder.make_user_urn(self.flow_urn.get_orchestrator_name()),
        ),
    )
    return [ownership]