code: func CssProviderGetNamed(name string, variant string) (*CssProvider, error) {
  	cname := C.CString(name)
  	defer C.free(unsafe.Pointer(cname))
  	cvariant := C.CString(variant)
  	defer C.free(unsafe.Pointer(cvariant))
  
  	c := C.gtk_css_provider_get_named((*C.gchar)(cname), (*C.gchar)(cvariant))
  	if c == nil {
  		return nil, nilPtrErr
  	}
  
  	obj := glib.Take(unsafe.Pointer(c))
  	return wrapCssProvider(obj), nil
  }
docs: // GetNamed is a wrapper around gtk_css_provider_get_named().