internal/bufio/bufio.go
func (w *Writer) WriteUint32(i uint32) {
	if w.err != nil {
		return
	}
	binary.LittleEndian.PutUint32(w.b[:4], i)
	w.wr.Write(w.b[:4])
}
func (w *Writer) WriteUint32(i uint32) {
	if w.err != nil {
		return
	}
	binary.LittleEndian.PutUint32(w.b[:4], i)
	w.wr.Write(w.b[:4])
}
// WriteUint32 writes an uint32.