import { Observable, OperatorFunction, Subject } from "rxjs";
export declare function splitBy<T, S extends T>(predicate: (value: T, index: number) => value is S, subjectSelector?: () => Subject<T>): OperatorFunction<T, [Observable<S>, Observable<Exclude<T, S>>]>;
export declare function splitBy<T>(predicate: (value: T, index: number) => boolean, subjectSelector?: () => Subject<T>): OperatorFunction<T, [Observable<T>, Observable<T>]>;