code: func (v *Stack) AddNamed(child IWidget, name string) {
  	cstr := C.CString(name)
  	defer C.free(unsafe.Pointer(cstr))
  	C.gtk_stack_add_named(v.native(), child.toWidget(), (*C.gchar)(cstr))
  }
docs: // AddNamed is a wrapper around gtk_stack_add_named().