@abc.abstractmethod<EOL><INDENT>def get_granularity(self):<DEDENT>
return<EOL>
Gets the granularity of this duration.

        The granularity indicates the resolution of the clock. More
        precision than what is specified in this method cannot be
        inferred from the available data.

        :return: the time units
        :rtype: ``osid.calendaring.DateTimeResolution``


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