@abc.abstractmethod<EOL><INDENT>def match_blackout(self, datetime, match):<DEDENT>
pass<EOL>
Matches a blackout that contains the given date time.

        :param datetime: a datetime
        :type datetime: ``osid.calendaring.DateTime``
        :param match: ``true`` for a positive match, ``false`` for a negative match
        :type match: ``boolean``
        :raise: ``NullArgument`` -- ``datetime`` is ``null``

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