code: func (n *Network) PeerOrgs() []*Organization {
  	orgsByName := map[string]*Organization{}
  	for _, p := range n.Peers {
  		orgsByName[p.Organization] = n.Organization(p.Organization)
  	}
  
  	orgs := []*Organization{}
  	for _, org := range orgsByName {
  		orgs = append(orgs, org)
  	}
  	return orgs
  }
docs: // PeerOrgs returns all Organizations associated with at least one Peer.