code: def to_gds(self, multiplier, timestamp=None):
          
          now = datetime.datetime.today() if timestamp is None else timestamp
          name = self.name
          if len(name) % 2 != 0:
              name = name + '\0'
          return struct.pack(
              '>16h', 28, 0x0502, now.year, now.month, now.day, now.hour,
              now.minute, now.second, now.year, now.month, now.day, now.hour,
              now.minute, now.second, 4 + len(name),
              0x0606) + name.encode('ascii') + b''.join(
                  element.to_gds(multiplier)
                  for element in self.elements) + b''.join(
                      label.to_gds(multiplier)
                      for label in self.labels) + struct.pack('>2h', 4, 0x0700)
docs: Convert this cell to a GDSII structure.
  
          Parameters
          ----------
          multiplier : number
              A number that multiplies all dimensions written in the GDSII
              structure.
          timestamp : datetime object
              Sets the GDSII timestamp.  If ``None``, the current time is
              used.
  
          Returns
          -------
          out : string
              The GDSII binary string that represents this cell.