tooltip method

Future<void> tooltip (String message)

Sends a semantic announcement of a tooltip.

Currently only honored on Android. The contents of message will be read by TalkBack.

Implementation 

static Future<void> tooltip(String message) async {
  final TooltipSemanticsEvent event = TooltipSemanticsEvent(message);
  await SystemChannels.accessibility.send(event.toMap());
}