Постоянная STENCIL_BACK_REF
Реализация
static const int STENCIL_BACK_REF = 0x8CA3;
© 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/STENCIL_BACK_REF-constant.html
