Handles a series of key events.
- macOS 10.0+
An array of key-event characters to give to the system input manager.
This method, which is invoked by subclasses from the
key method, sends the character input in
event to the system input manager for interpretation as text to insert or commands to perform. The input manager responds to the request by sending
do messages back to the invoker of this method. Subclasses shouldn’t override this method.