Постоянная TIME_ELAPSED_EXT
Реализация
static const int TIME_ELAPSED_EXT = 0x88BF;
© 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/ExtDisjointTimerQuery/TIME_ELAPSED_EXT-constant.html
