def METHOD_NAME(db_session, user_vetinari, org_uu, project_expo2010):
    sponsorship = models.ProjectSponsorMembership(
        granted_by=user_vetinari,
        member=org_uu,
        project=project_expo2010,
        is_promoted=True,
        label="Diamond",
    )
    db_session.add(sponsorship)
    db_session.commit()
    return sponsorship