code: def _parse_header(self):
          
          self.print("Parsing the DETX header")
          self._det_file.seek(0, 0)
          first_line = self._readline()
          try:
              self.det_id, self.n_doms = split(first_line, int)
              self.version = 'v1'
          except ValueError:
              det_id, self.version = first_line.split()
              self.det_id = int(det_id)
              validity = self._readline().strip()
              self.valid_from, self.valid_until = split(validity, float)
              raw_utm_info = self._readline().strip().split(' ')
              try:
                  self.utm_info = UTMInfo(*raw_utm_info[1:])
              except TypeError:
                  log.warning("Missing UTM information.")
              n_doms = self._readline()
              self.n_doms = int(n_doms)
docs: Extract information from the header of the detector file