@abc.abstractmethod<EOL><INDENT>def update_type(self, type_form):<DEDENT>
pass<EOL>
Updates a type.

        :param type_form: the type form
        :type type_form: ``osid.type.TypeForm``
        :raise: ``IllegalState`` -- ``type_form`` already used in an update transaction
        :raise: ``InvalidArgument`` -- the form contains an invalid value
        :raise: ``NullArgument`` -- ``type_form`` is ``null``
        :raise: ``OperationFailed`` -- unable to complete request
        :raise: ``PermissionDenied`` -- authorization failure
        :raise: ``Unsupported`` -- ``type_form`` did not originate from ``get_type_form_for_update()``

        *compliance: mandatory -- This method must be implemented.*