code: def get_sequence_str(self):
          '''
          :return: string representation of the sequence
          '''
          sequence = self.get_sequence()
          return '->'.join(e.dst.name for e in sequencef get_sequence_str(self):
          '''
          :return: string representation of the sequence
          '''
          sequence = self.get_sequence()
          return '->'.join(e.dst.name for e in sequence)
docs: :return: string representation of the sequence