code: func (v *Pixbuf) GetPixels() (channels []byte) {
  	var length C.guint
  	c := C.gdk_pixbuf_get_pixels_with_length(v.native(), &length)
  	sliceHeader := (*reflect.SliceHeader)(unsafe.Pointer(&channels))
  	sliceHeader.Data = uintptr(unsafe.Pointer(c))
  	sliceHeader.Len = int(length)
  	sliceHeader.Cap = int(length)
  
  	// To make sure the slice doesn't outlive the Pixbuf, add a reference
  	v.Ref()
  	runtime.SetFinalizer(&channels, func(_ *[]byte) {
  		v.Unref()
  	})
  	return
  }
docs: // GetPixels is a wrapper around gdk_pixbuf_get_pixels_with_length().
  // A Go slice is used to represent the underlying Pixbuf data array, one
  // byte per channel.