Method constructor

packages/mobx/src/types/observableset.ts:78–93

(
        initialData?: IObservableSetInitialValues<T>,
        enhancer: IEnhancer<T> = deepEnhancer,
        public name_ = __DEV__ ? "ObservableSet@" + getNextId() : "ObservableSet"
    )

    enhancer_: (newV: any, oldV: any | undefined) => any

    constructor(
        initialData?: IObservableSetInitialValues<T>,
        enhancer: IEnhancer<T> = deepEnhancer,
        public name_ = __DEV__ ? "ObservableSet@" + getNextId() : "ObservableSet"
    ) {
        if (!isFunction(Set)) {
            die(22)
        }
        this.enhancer_ = (newV, oldV) => enhancer(newV, oldV, name_)
        initObservable(() => {
            this.atom_ = createAtom(this.name_)
            if (initialData) {
                this.replace(initialData)
            }
        })
    }

    private dehanceValue_<X extends T | undefined>(value: X): X {
        if (this.dehancer !== undefined) {