public @Nonnull String getTimestampString() {
        long duration = System.currentTimeMillis()-timestamp.getTime();
        return Util.getPastTimeString(duration);
    }
public @ Nonnull String getTimestampString ( ) { long duration = System . currentTimeMillis ( ) - timestamp . getTime ( ) ; return Util . getPastTimeString ( duration ) ; }
Gets the string that says how long since this build has scheduled.

@return
string like "3 minutes" "1 day" etc.