public function disableSubmit(array &$form, FormStateInterface $form_state)
    {
        $types = array();
        foreach ($form_state->getValue('types') as $type => $selected) {
            if ($type === $selected) {
                $types[] = $type;
            }
        }

        if (empty($types)) {
            drupal_set_message($this->t("Nothing to do"));
            return;
        }

        $disabled = variable_get(APB_VAR_ENABLED_TYPES, []);
        $disabled += $types;

        if (empty($disabled)) {
            variable_set(APB_VAR_ENABLED_TYPES, null);
        } else {
            variable_set(APB_VAR_ENABLED_TYPES, array_unique($disabled));
        }

        drupal_set_message($this->t("Disabled selected types"));
    }