docs: def wl_uris(self):
          """\
          Returns cable IRIs to WikiLeaks (mirrors).
          """
          def year_month(d):
              date, time = d.split()
              return date.split('-')[:2]
          if not self.created:
              raise ValueError('The "created" property must be provided')
          year, month = year_month(self.created)
          l = u'%s/%s/%s' % (year, month, self.reference_id)
          html = l + u'.html'
          wl_uris = []
          append = wl_uris.append
          for wl in _WL_CABLE_BASE_URIS:
              append(wl + l)
              append(wl + html)
          return wl_uris