docs: def sort(self, *args):
  		"""
  		Sort the internal segment lists.  The optional args are
  		passed to the .sort() method of the segment lists.  This
  		can be used to control the sort order by providing an
  		alternate comparison function.  The default is to sort by
  		start time with ties broken by end time.
  		"""
  		self.valid.sort(*args)
  		self.active.sort(*args)