@utilities.arguments_not_none<EOL><INDENT>def set_rule(self, rule_id):<DEDENT>
raise errors.Unimplemented()<EOL>
Sets a rule.

        arg:    rule_id (osid.id.Id): the new rule
        raise:  InvalidArgument - ``rule_id`` is invalid
        raise:  NoAccess - ``Metadata.isReadOnly()`` is ``true``
        raise:  NullArgument - ``rule_id`` is ``null``
        *compliance: mandatory -- This method must be implemented.*