class TokenConverter

class TokenConverter implements ParamConverterInterface {
    
    /**
     * {@inheritdoc}
     */
    public function convert($value, $definition, $name, array $defaults) {
        // "profiler" service isn't injected to prevent circular reference when
        // more than one language is active and "Account administration pages" is
        // enabled on admin/config/regional/language/detection. See #2710787 for
        // more information.
        
        /** @var \Drupal\webprofiler\Profiler\Profiler $profiler */
        $profiler = \Drupal::service('profiler');
        if (NULL === $profiler) {
            return NULL;
        }
        $profile = $profiler->loadProfile($value);
        if (NULL === $profile) {
            return NULL;
        }
        return $profile;
    }
    
    /**
     * {@inheritdoc}
     */
    public function applies($definition, $name, Route $route) {
        if (!empty($definition['type']) && $definition['type'] === 'webprofiler:token') {
            return TRUE;
        }
        return FALSE;
    }

}