code: func (j *Job) Peers() []string {
  	peers := make([]string, 0)
  	peers = append(peers, j.requirements()[deprecatedXConditionPrefix+fleetMachineOf]...)
  	peers = append(peers, j.requirements()[fleetMachineOf]...)
  	return peers
  }
docs: // Peers returns a list of Job names that must be scheduled to the same
  // machine as this Job.