Hint for anyone trying to use this with runtime UI Toolkit

[patrickp-unity3d]

You'll need to populate s_RootVisualElement, but otherwise paste works thanks to this excellent plugin.

    static void SendKey(string baseKey)
    {
        if (s_RootVisualElement == null)
            return;
        
        string appleKey = "%" + baseKey;
        string naturalKey = "^" + baseKey;

        {
            var evt = Event.KeyboardEvent(naturalKey);
            using var keyEvt = KeyDownEvent.GetPooled(evt);
            s_RootVisualElement.SendEvent(keyEvt);
        }
        {
            var evt = Event.KeyboardEvent(appleKey);
            using var keyEvt = KeyDownEvent.GetPooled(evt);
            s_RootVisualElement.SendEvent(keyEvt);
        }
    }