code: def format(self, syncmap):
          
          self.log_exc(u"%s is abstract and cannot be called directly" % (self.TAG), None, True, NotImplementedError)
docs: Format the given ``syncmap`` as a Unicode string.
  
          :param syncmap: the syncmap to output
          :type syncmap: :class:`~aeneas.syncmap.SyncMap`
          :rtype: string