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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def check_ownership(obj, raise_if_false=True):
 """Meant to be used in `pre_update` hooks on models to enforce ownership Admin have all access, and other users need to be referenced on either the created_by field that comes with the ``AuditMixin``, or in a field named ``owners`` which is expected to be a one-to-many with the User model. It is meant to be used in the ModelView's pre_update hook in which raising will abort the update. """

    if not obj:
        return False

    security_exception = SupersetSecurityException(
        "You don't have the rights to alter [{}]".format(obj))

    if g.user.is_anonymous:
        if raise_if_false:
            raise security_exception
        return False
    roles = [r.name for r in get_user_roles()]
    if 'Admin' in roles:
        return True
    session = db.create_scoped_session()
    orig_obj = session.query(obj.__class__).filter_by(id=obj.id).first()

    # Making a list of owners that works across ORM models
    owners = []
    if hasattr(orig_obj, 'owners'):
        owners += orig_obj.owners
    if hasattr(orig_obj, 'owner'):
        owners += [orig_obj.owner]
    if hasattr(orig_obj, 'created_by'):
        owners += [orig_obj.created_by]

    owner_names = [o.username for o in owners if o]

    if (
            g.user and hasattr(g.user, 'username') and
            g.user.username in owner_names):
        return True
    if raise_if_false:
        raise security_exception
    else:
        return False