Method constructor

src/module/module-instance.ts:7–10

(
    private moduleManager: ModuleManager,
    public moduleDef: ModuleDefinition<S, A>
  )

  private _state: S | undefined;

  constructor(
    private moduleManager: ModuleManager,
    public moduleDef: ModuleDefinition<S, A>
  ) {}

  get state(): S {
    if (!this.moduleDef.createState) return undefined as S;