increment method
Implementation
@override
Future<num> increment(String key, [int value = 1]) async {
final response = await _request(
'increment',
key: key,
payload: <String, Object?>{'value': value},
);
final result = response['value'];
if (result is! num) {
throw StateError('Cloudflare store returned a non-numeric value.');
}
return result;
}