Свойство onFocus
override
Поток событий focus, обрабатываемых этим элементом.
Реализация
ElementStream<Event> get onFocus => focusEvent.forElement(this);
© 2012 the Dart project authors
Licensed under the BSD 3-Clause "New" or "Revised" License.
https://api.dart.dev/stable/2.18.5/dart-svg/SvgElement/onFocus.html
