def is_disabled(self):
<EOL>return True<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: (boolean) - ``true`` if this operable is disabled,
                ``false`` if the active status is determined by other
                rules
        *compliance: mandatory -- This method must be implemented.*