1119         if revs is None:

  1119         if revs is None:

  1120             try:

  1120             try:

  1121                 return self.index.headrevs()

  1121                 return self.index.headrevs()

  1122             except AttributeError:

  1122             except AttributeError:

  1123                 return self._headrevs()

  1123                 return self._headrevs()

  1124         return dagop.headrevs(revs, self._uncheckedparentrevs)

  1126         return dagop.headrevs(revs, self._uncheckedparentrevs)

  1125 

  1127 

  1126     def computephases(self, roots):

  1128     def computephases(self, roots):

  1127         return self.index.computephasesmapsets(roots)

  1129         return self.index.computephasesmapsets(roots)

  1128 

  1130