Campiagn Classic Android line breaks

How does one add line breaks to an android push in campaign classic? 

yes, we have NotificationCompat.BigTextStyle() coded in the app which allows the message to expnd bu it 1 single line and we would hope to add line breaks.

We tried appending 

var body = delivery.content.androidMessage.source;
body = body.replace(/\n/g, '\n').replace(/\n\r/g, '\n').replace(/\r/g, '\n'); and a few other verions but no luck.

In comparison ACS(standard) you can add line breaks.