code: def regular_fragments(self):
          
          for i, fragment in enumerate(self.__fragments):
              if fragment.fragment_type == SyncMapFragment.REGULAR:
                  yield (i, fragment)
docs: Iterates through the regular fragments in the list
          (which are sorted).
  
          :rtype: generator of (int, :class:`~aeneas.syncmap.SyncMapFragment`)