Tell the driver to perform a scrolling action.
A scrolling action begins with a "pointer down" event, which commonly maps to finger press on the touch screen or mouse button press. A series of "pointer move" events follow. The action is completed by a "pointer up" event.
dx and dy specify the total offset for the entire scrolling action.
duration specifies the length of the action.
The move events are generated at a given frequency in Hz (or events per
second). It defaults to 60Hz.
Source
Future<Null> scroll(SerializableFinder finder, double dx, double dy, Duration duration, {int frequency: 60}) async {
return await _sendCommand(new Scroll(finder, dx, dy, duration, frequency)).then((Map<String, dynamic> _) => null);
}