@abc.abstractmethod<EOL><INDENT>def is_disabled(self):<DEDENT>
return<EOL>
Tests if this operable is administravely disabled.

        Administratively disabling overrides any applied
        ``OsidEnabler``. If this method returns ``true`` then
        ``is_enabled()`` must return ``false``.

        :return: ``true`` if this operable is disabled, ``false`` if the active status is determined by other rules
        :rtype: ``boolean``


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