Постоянная sigchld
Реализация
static const ProcessSignal sigchld = const ProcessSignal._(17, "SIGCHLD");
© 2012 the Dart project authors
Licensed under the BSD 3-Clause "New" or "Revised" License.
https://api.dart.dev/stable/2.18.5/dart-io/ProcessSignal/sigchld-constant.html
