grpc/streambuffer/streambuffer.go
func New(bufferSize int, setup func() (grpc.ClientStream, error)) *Stream {
	return &Stream{
		setupFunc:  setup,
		sendBuffer: make(chan interface{}, bufferSize),
		log:        ttnlog.Get(),
	}
}
func New(bufferSize int, setup func() (grpc.ClientStream, error)) *Stream {
	return &Stream{
		setupFunc:  setup,
		sendBuffer: make(chan interface{}, bufferSize),
		log:        ttnlog.Get(),
	}
}
// New returns a new Stream with the given buffer size and setup function.