static TailFile tailFileLinewiseFromStart(File file, int interval, VF1<S> onData) {
  ret tailFileFromStart(file, interval,
    toIVF1(vfAppendToLineBuffer(new LineBuffer(onData))));
}

static TailFile tailFileLinewiseFromStart(File file, int interval, IVF1<S> onData) {
  ret tailFileLinewiseFromStart(file, interval, toVF1(onData));
}