isActivateKey function
Implementation
bool isActivateKey(LogicalKeyboardKey key) {
final Iterable<LogicalKeyboardKey> activateKeys = WidgetsApp.defaultShortcuts.entries
.where((MapEntry<ShortcutActivator, Intent> entry) => entry.value is ActivateIntent)
.map<ShortcutActivator>((MapEntry<ShortcutActivator, Intent> entry) => entry.key)
.where((ShortcutActivator activator) => activator.triggers?.length == 1)
.map<LogicalKeyboardKey>((ShortcutActivator activator) => activator.triggers!.single);
return activateKeys.contains(key);
}