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