prompt method
Implementation
Future<String> prompt({ResponseChecker? checker}) {
var completer = Completer<String>();
var doAsk;
doAsk = () {
Console.adapter.write(message);
Future(() {
if (secret) Console.adapter.echoMode = false;
var response = Console.readLine();
if (secret) Console.adapter.echoMode = true;
if (checker != null && response != null && !checker(response)) {
doAsk();
return;
}
completer.complete(response);
});
};
doAsk();
return completer.future;
}