gtk/style.go
func (v *StyleContext) HasClass(className string) bool {
	cstr := C.CString(className)
	defer C.free(unsafe.Pointer(cstr))

	return gobool(C.gtk_style_context_has_class(v.native(), (*C.gchar)(cstr)))
}
func (v *StyleContext) HasClass(className string) bool {
	cstr := C.CString(className)
	defer C.free(unsafe.Pointer(cstr))

	return gobool(C.gtk_style_context_has_class(v.native(), (*C.gchar)(cstr)))
}
// HasClass is a wrapper around gtk_style_context_has_class().