stelf

let providerHandler = {
    get: async(target, name) => {
        console.log('load someting from remote...')
        return new Promise( (res, rej) => {
            setTimeout(() => res(42), 4200)
        })
    },
    set: function (obj, prop, value) {
        return new Promise((res, rej) => {

hediet

type StringBool = "true"|"false";


interface AnyNumber { prev?: any, isZero: StringBool };
interface PositiveNumber { prev: any, isZero: "false" };

type IsZero<TNumber extends AnyNumber> = TNumber["isZero"];
type Next<TNumber extends AnyNumber> = { prev: TNumber, isZero: "false" };
type Prev<TNumber extends PositiveNumber> = TNumber["prev"];