src/vs/platform/keybinding/common/baseResolvedKeybinding.ts/BaseResolvedKeybinding/constructor
class BaseResolvedKeybinding:	constructor(os: OperatingSystem, parts: T[]) {
		super();
		if (parts.length === 0) {
			throw illegalArgument(`parts`);
		}
		this._os = os;
		this._parts = parts;
	}