"Press any key"

Is there a way to check if any key is pressed? There are the globals to check shift and ctrl, DzApp can check the modifiers generally and for a particular key or combo, but I don't see a method to ask if any key has been pressed (returning a string, presumably). I want to be able to stop a script with any key press, rather than having to ask for one in particular. dzApp also has the mouseEvent() signal, but there doesn't seem to be a keyboardEvent() to match