launchMap function
Implementation
void launchMap(double lat, double lng, {bool adaptive = true}) async {
var url = '';
if (Platform.isIOS && adaptive) {
url = 'https://maps.apple.com/?q=$lat,$lng';
} else {
url = "https://www.google.com/maps/search/?api=1&query=$lat,$lng";
}
await launchUrlString(
url,
mode: LaunchMode.externalApplication,
);
}