src/vs/workbench/services/keybinding/common/macLinuxKeyboardMapper.ts/MacLinuxKeyboardMapper/getAriaLabelForScanCodeBinding
class MacLinuxKeyboardMapper:	public getAriaLabelForScanCodeBinding(binding: ScanCodeBinding | null): string | null {
		if (!binding) {
			return null;
		}
		if (binding.isDuplicateModifierCase()) {
			return '';
		}
		return this._scanCodeToLabel[binding.scanCode];
	}