@utilities.arguments_not_none<EOL><INDENT>def set_time_type(self, time_type):<DEDENT>
self._time_type = time_type<EOL>
Sets the time type.

        arg:    time_type (osid.type.Type): the time type
        raise:  NullArgument - ``time_type`` is ``null``
        *compliance: mandatory -- This method must be implemented.*