src/vs/platform/keybinding/common/usLayoutResolvedKeybinding.ts/USLayoutResolvedKeybinding/_getLabel
class USLayoutResolvedKeybinding:	protected _getLabel(keybinding: SimpleKeybinding): string | null {
		if (keybinding.isDuplicateModifierCase()) {
			return '';
		}
		return this._keyCodeToUILabel(keybinding.keyCode);
	}