свойство hasTerminal
Указывает, подключен ли терминал к stdout.
Реализация
bool get hasTerminal => _hasTerminal(_fd);
© 2012 the Dart project authors
Licensed under the BSD 3-Clause "New" or "Revised" License.
https://api.dart.dev/stable/2.19.6/dart-io/Stdout/hasTerminal.html
