request method
Request the user for access to this Permission, if access hasn't already been grant access before.
Returns the new PermissionStatus.
Implementation
Future<PermissionStatus> request() async {
final permissionStatus =
(await [this].request())[this] ?? PermissionStatus.denied;
if (permissionStatus.isDenied) {
_onDenied?.call();
} else if (permissionStatus.isGranted) {
_onGranted?.call();
} else if (permissionStatus.isPermanentlyDenied) {
_onPermanentlyDenied?.call();
} else if (permissionStatus.isRestricted) {
_onRestricted?.call();
} else if (permissionStatus.isLimited) {
_onLimited?.call();
} else if (permissionStatus.isProvisional) {
_onProvisional?.call();
}
return permissionStatus;
}