def setLocalRoles(obj, member_ids, member_role, reindex=True):
    """ Assign a local role on an item to one or more members.

        o 'obj' is the object on which to assign the role.

        o 'member_ids' is a sequence of user IDs to which to assign the role.

        o 'member_role' is the name of the role to assign.

        o If 'reindex' is True, then reindex the security-related attributes
          of the object and all subobjects.

        o Raise Unauthorized if the currently-authenticated member cannot
          assign 'member_role' on 'obj'.

        o Permission:  Public # ????
        """
