code: func Default() map[pb.NetMode]Provider {
  	return map[pb.NetMode]Provider{
  		// FIXME: still uses host if no provider configured
  		pb.NetMode_UNSET: NewHostProvider(),
  		pb.NetMode_HOST:  NewHostProvider(),
  		pb.NetMode_NONE:  NewNoneProvider(),
  	}
  }
docs: // Default returns the default network provider set