protected function getUnselectedFields() {
    $profile_fields = $this->fieldStorage->loadByProperties(['entity_type' => 'profile', 'bundle' => 'profile']);
    $settings = $this->configFactory->get('social_profile_fields.settings');
    $empty = [];

    /** @var \Drupal\field\Entity\FieldConfig $value */
    foreach ($profile_fields as $key => $value) {
      $sval = $settings->get(str_replace('.', '_', $key));

      if (isset($sval) && $sval == FALSE) {
        $empty[] = $value->getName();
      }
    }
    return $empty;
  }