@utilities.arguments_not_none<EOL><INDENT>def get_assessments_offered_by_date(self, start, end):<DEDENT>
raise errors.Unimplemented()<EOL>
Gets an ``AssessmentOfferedList`` that have designated start times where the start times fall in the given range inclusive.

        In plenary mode, the returned list contains all known
        assessments offered or an error results. Otherwise, the returned
        list may contain only those assessments offered that are
        accessible through this session.

        arg:    start (osid.calendaring.DateTime): start of time range
        arg:    end (osid.calendaring.DateTime): end of time range
        return: (osid.assessment.AssessmentOfferedList) - the returned
                ``AssessmentOffered`` list
        raise:  InvalidArgument - ``end`` is less than ``start``
        raise:  OperationFailed - unable to complete request
        raise:  PermissionDenied - authorization failure occurred
        *compliance: mandatory -- This method must be implemented.*