import { Awaitable, Undefinable } from "../Types";
import BaseModelState from './BaseModelState';
export default class FactoryModelState<T> extends BaseModelState<T> {
    #private;
    /**
    * Creates a new PollingModelState
    * @param valueFactory can be a value factory
    */
    constructor(valueFactory: () => T, updateNow?: boolean);
    /**
      * Creates a new PollingModelState
      * @param promiseFactory can be a promise factory
      */
    constructor(promiseFactory: () => Promise<T>, updateNow?: boolean);
    /**
    * Creates a new PollingModelState
    * @param promiseOrValueFactory can be a promise or a value factory, a value or a promise that will be invoked immediately
    */
    constructor(promiseOrValueFactory: (() => Awaitable<T>), updateNow?: boolean);
    subscribe(postCallback: (value: Undefinable<T>) => void, preCallback?: (value: Undefinable<T>) => void): string;
    /** Gets the current value of the ModelState */
    get value(): Undefinable<T>;
    set value(value: Undefinable<T>);
    update(): void;
}