@utilities.arguments_not_none<EOL><INDENT>def set_calendar_type(self, calendar_type):<DEDENT>
self._calendar_type = calendar_type<EOL>
Sets the calendar type.

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