Import a file

        :returns: None
        :rtype: None
        :raises: NotImplementedError

def import_file(self, ):
        """Import a file

        :returns: None
        :rtype: None
        :raises: NotImplementedError
        """
        tfi = self.get_taskfileinfo_selection()
        if tfi:
            self.reftrack.import_file(tfi)