docs: def encode(self, tag):
          """
          Parses a CWR file name from a FileTag object.
  
          The result will be a string following the format CWyynnnnsss_rrr.Vxx,
          where the numeric sequence will have the length set on the encoder's
          constructor.
  
          :param tag: FileTag to parse
          :return: a string file name parsed from the FileTag
          """
          # Acquires sequence number
          sequence = str(tag.sequence_n)
  
          # If the sequence is bigger the max, it is cut
          if len(sequence) > self._sequence_l:
              sequence = sequence[:self._sequence_l]
  
          # If the sequence is smaller the max, it is padded with zeroes
          while len(sequence) < self._sequence_l:
              sequence = '0' + sequence
  
          # Acquires version
          version = str(tag.version)
  
          # If the version is too long only the first and last number are taken,
          # to remove decimal separator
          if len(version) > 2:
              version = version[:1] + version[-1:]
  
          # If the version is too short, it is padded with zeroes
          while len(version) < 2:
              version = '0' + version
  
          # Acquires year
          # Only the two last digits of the year are used
          year = str(tag.year)[-2:]
  
          # Acquires sender and receiver
          sender = tag.sender[:3]
          receiver = tag.receiver[:3]
  
          rule = self._header + year + sequence + sender
          rule = rule + self._ip_delimiter + receiver + ".V" + version
  
          return rule