code: func (sn *SimNode) NodeInfo() *p2p.NodeInfo {
  	server := sn.Server()
  	if server == nil {
  		return &p2p.NodeInfo{
  			ID:    sn.ID.String(),
  			Enode: sn.Node().String(),
  		}
  	}
  	return server.NodeInfo()
  }
docs: // NodeInfo returns information about the node