code: func (s *Snapshot) signers() []common.Address {
  	sigs := make([]common.Address, 0, len(s.Signers))
  	for sig := range s.Signers {
  		sigs = append(sigs, sig)
  	}
  	sort.Sort(signersAscending(sigs))
  	return sigs
  }
docs: // signers retrieves the list of authorized signers in ascending order.