func (v *Widget) SizeAllocate(allocation *Allocation) {
	C.gtk_widget_size_allocate(v.native(), allocation.native())
}
func (v *Widget) SizeAllocate(allocation *Allocation) {
	C.gtk_widget_size_allocate(v.native(), allocation.native())
}
// SizeAllocate is a wrapper around gtk_widget_size_allocate().