Iterates through the regular fragments in the list
        (which are sorted).

        :rtype: generator of (int, :class:`~aeneas.syncmap.SyncMapFragment`)

def regular_fragments(self):
        """
        Iterates through the regular fragments in the list
        (which are sorted).

        :rtype: generator of (int, :class:`~aeneas.syncmap.SyncMapFragment`)
        """
        for i, fragment in enumerate(self.__fragments):
            if fragment.fragment_type == SyncMapFragment.REGULAR:
                yield (i, fragment)