'#description'=>$this->t('A file extension list separated by the | character that will be tracked as download when clicked. Regular expressions are supported. For example: @extensions',['@extensions'=>GOOGLE_ANALYTICS_TRACKFILES_EXTENSIONS]),
'#description'=>$this->t('A file extension list separated by the | character that will be tracked as download when clicked. Regular expressions are supported. For example: @extensions',['@extensions'=>GoogleAnalitycsInterface::GOOGLE_ANALYTICS_TRACKFILES_EXTENSIONS]),