@utilities.arguments_not_none<EOL><INDENT>def match_duration(self, low, high, match):<DEDENT>
raise errors.Unimplemented()<EOL>
Matches assessments whose duration falls between the specified range inclusive.

        arg:    low (osid.calendaring.Duration): start range of duration
        arg:    high (osid.calendaring.Duration): end range of duration
        arg:    match (boolean): ``true`` for a positive match,
                ``false`` for a negative match
        raise:  InvalidArgument - ``end`` is less than ``start``
        raise:  NullArgument - ``start`` or ``end`` is ``null``
        *compliance: mandatory -- This method must be implemented.*