code: func (b *Builder) SetReplicaCount(v int) {
  	if v < 1 {
  		v = 1
  	}
  	if v > 127 {
  		v = 127
  	}
  	b.ring.SetReplicaCount(v)
  }
docs: // SetReplicaCount changes the replica count of the builder. Lowering the
  // replica count will simply discard the higher replicas. Raising the replica
  // count will create new higher replicas that will be completely unassigned and
  // will require a call to Rebalance to become assigned.