code: public function supportsValue(PickerConfig $config): bool
      {
          $value = $config->getValue();
  
          if ('file' === $config->getContext()) {
              return Validator::isUuid($value);
          }
  
          return false !== strpos($value, '{{file::') || 0 === strpos($value, $this->uploadPath);
      }
docs: {@inheritdoc}