/**
         * {@inheritdoc}
         */
-       public function configureOptions(OptionsResolver $resolver) {
+       public function configureOptions(OptionsResolver $resolver): void {
                //Set defaults
                $resolver->setDefaults(['error_bubbling' => true]);
        }
        /**
         * {@inheritdoc}
         */
-       public function getName() {
+       public function getName(): string {
                return 'contact_form';
        }
 }