Get http headers content-length property from ionic-native http

Ionic Native
1

Hi all ! Could anyone suggest please, how to get content-length from ionic-native http ?

    this.http.sendRequest(link,
        {
          method: 'get',
          timeout: 30000
        }
    ).then(result => {

      // prints 200
      console.log("method get", result.status);
     console.log("method get headers", result.headers);

    }).catch(err => {

          console.log(err.status);

 });