code: func (v *Alignment) Set(xalign, yalign, xscale, yscale float32) {
  	C.gtk_alignment_set(v.native(), C.gfloat(xalign), C.gfloat(yalign),
  		C.gfloat(xscale), C.gfloat(yscale))
  }
docs: // Set is a wrapper around gtk_alignment_set().