code: func (m *model) GetHello(id protocol.DeviceID) protocol.HelloIntf {
  	name := ""
  	if _, ok := m.cfg.Device(id); ok {
  		name = m.cfg.MyName()
  	}
  	return &protocol.Hello{
  		DeviceName:    name,
  		ClientName:    m.clientName,
  		ClientVersion: m.clientVersion,
  	}
  }
docs: // GetHello is called when we are about to connect to some remote device.