LEDx.toggle()?

LEDx.set/reset functions help - were they available before?

Yes, pretty much right since the start :)

I've resisted putting toggle in so far because it's only use is really for LEDs. People think it's just write(!read()) but in reality it's a bit more nuanced than that because read reads the input register, which is actually different to the current output state (think what happens in opendrain mode).

What @allObjects is suggesting (this.write(pin, !this.read();) should work ok for LEDs though. It should be pretty easy to upload that beforehand?