code: def ParseFromUnicode(self, value):
      
      precondition.AssertType(value, Text)
      value = value.strip()
  
      super(ClientURN, self).ParseFromUnicode(value)
  
      match = self.CLIENT_ID_RE.match(self._string_urn)
      if not match:
        raise type_info.TypeValueError("Client urn malformed: %s" % value)
  
      clientid = match.group("clientid")
      clientid_correctcase = "".join((clientid[0].upper(), clientid[1:].lower()))
  
      self._string_urn = self._string_urn.replace(clientid, clientid_correctcase,
                                                  1)
docs: Parse a string into a client URN.
  
      Convert case so that all URNs are of the form C.[0-9a-f].
  
      Args:
        value: string value to parse