import { IObservable } from '@lifaon/rx-js-light';
import { ILocales } from '../locales/locales.type';
import { INumberFormatOptions, INumberFormatValue } from './number-format.type';
export declare function numberFormatObservable(value: IObservable<INumberFormatValue>, locales: IObservable<ILocales>, options?: IObservable<INumberFormatOptions>): IObservable<string>;