src/vs/base/browser/ui/keybindingLabel/keybindingLabel.ts/KeybindingLabel/areSame
class KeybindingLabel:	private static areSame(a: Matches | undefined, b: Matches | undefined): boolean {
		if (a === b || (!a && !b)) {
			return true;
		}
		return !!a && !!b && equals(a.firstPart, b.firstPart) && equals(a.chordPart, b.chordPart);
	}