https://api.dart.dev/stable/3.2.3/dart-html/KeyEvent/shiftKey.html
shiftKey property - KeyEvent class - dart:html library - Dart API
API docs for the shiftKey property from the KeyEvent class, for the Dart programming language.
propertykeyeventclassdarthtml
https://adbtoolkit.com/commands/input-keyevent-65-keycode-envelope/
adb shell input keyevent 65 — Android ADB Command Guide & Syntax | ADB Toolkit
Simulates pressing the KEYCODE_ENVELOPE hardware key (Launch default email client.). Syntax: input keyevent 65. Risk: SAFE. Compatibility: Android 1.0+.
adbshellinputkeyeventandroid