ctrlKey boolean (optional) - whether the Control key was used in an accelerator to trigger the Event
metaKey boolean (optional) - whether a meta key was used in an accelerator to trigger the Event
shiftKey boolean (optional) - whether a Shift key was used in an accelerator to trigger the Event
altKey boolean (optional) - whether an Alt key was used in an accelerator to trigger the Event
triggeredByAccelerator boolean (optional) - whether an accelerator was used to trigger the event as opposed to another user gesture like mouse click