@abc.abstractmethod<EOL><INDENT>def set_time_type(self, time_type):<DEDENT>
pass<EOL>
Sets the time type.

        :param time_type: the time type
        :type time_type: ``osid.type.Type``
        :raise: ``NullArgument`` -- ``time_type`` is ``null``

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