Постоянная FRONT_AND_BACK
Реализация
static const int FRONT_AND_BACK = 0x0408;
© 2012 the Dart project authors
Licensed under the BSD 3-Clause "New" or "Revised" License.
https://api.dart.dev/stable/2.18.5/dart-web_gl/WebGL/FRONT_AND_BACK-constant.html
