code: def to_segment_xml(self, override_file_if_exists=False):
          
          # create XML doc and add process table
          outdoc = ligolw.Document()
          outdoc.appendChild(ligolw.LIGO_LW())
          process = ligolw_process.register_to_xmldoc(outdoc, sys.argv[0], {})
  
          for key, seglist in self.segment_dict.items():
              ifo, name = self.parse_segdict_key(key)
              # Ensure we have LIGOTimeGPS
              fsegs = [(lal.LIGOTimeGPS(seg[0]),
                        lal.LIGOTimeGPS(seg[1])) for seg in seglist]
  
              if self.seg_summ_dict is None:
                  vsegs = [(lal.LIGOTimeGPS(seg[0]),
                            lal.LIGOTimeGPS(seg[1])) \
                           for seg in self.valid_segments]
              else:
                  vsegs = [(lal.LIGOTimeGPS(seg[0]),
                            lal.LIGOTimeGPS(seg[1])) \
                           for seg in self.seg_summ_dict[key]]
  
              # Add using glue library to set all segment tables
              with ligolw_segments.LigolwSegments(outdoc, process) as x:
                  x.add(ligolw_segments.LigolwSegmentList(active=fsegs,
                                      instruments=set([ifo]), name=name,
                                      version=1, valid=vsegs))
  
          # write file
          url = urlparse.urljoin('file:', urllib.pathname2url(self.storage_path))
          if not override_file_if_exists or not self.has_pfn(url, site='local'):
              self.PFN(url, site='local')
          ligolw_utils.write_filename(outdoc, self.storage_path)
docs: Write the segment list in self.segmentList to self.storage_path.