packages/flutter/lib/src/foundation/_features.dart

// Copyright 2014 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

import 'package:meta/meta.dart';

/// Whether the windowing feature is enabled for the current
/// application.
///
/// Do not use this API. Flutter will make breaking changes
/// to this API, even in patch versions.
///
/// If this returns `false`, `@internal` APIs in the following
/// files will throw an `UnsupportedError`:
///
/// 1. packages/flutter/lib/src/widgets/_window.dart
///
/// See: https://github.com/flutter/flutter/issues/30701.
@internal
bool isWindowingEnabled = debugEnabledFeatureFlags.contains('windowing');

/// The feature flags this app was built with.
///
/// Do not use this API. Flutter can and will make breaking changes to this API.
@internal
Set<String> debugEnabledFeatureFlags = <String>{
  ...const String.fromEnvironment('FLUTTER_ENABLED_FEATURE_FLAGS').split(','),
};