@abc.abstractmethod<EOL><INDENT>def is_extrapolated(self):<DEDENT>
return<EOL>
Tests if this report is extrapolated outside measured data or known transactions.

        Extrapolation may occur if the start or end date fall outside
        two known facts or managed time period. Extrapolation may occur
        within a managed time period in progress where the results of
        the entire time period are projected.

        :return: ``true`` if this report is extrapolated, ``false`` otherwise
        :rtype: ``boolean``


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