gtk/widget.go
func (v *Widget) GetAllocation() *Allocation {
	var a Allocation
	C.gtk_widget_get_allocation(v.native(), a.native())
	return &a
}
func (v *Widget) GetAllocation() *Allocation {
	var a Allocation
	C.gtk_widget_get_allocation(v.native(), a.native())
	return &a
}
// GetAllocation is a wrapper around gtk_widget_get_allocation().