import { MonoTypeOperatorFunction } from 'rxjs';
import { TrimPositionValue } from '../types/position';
export declare function trimString(position?: TrimPositionValue): MonoTypeOperatorFunction<string>;
export declare function trimLeft(): MonoTypeOperatorFunction<string>;
export declare function trimRight(): MonoTypeOperatorFunction<string>;
export declare function trim(): MonoTypeOperatorFunction<string>;