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