import { Observable, ObservableInput } from "rxjs";
/** @internal */
export declare function partition<T, U extends T>(source: ObservableInput<T>, predicate: (value: T) => value is U): [Observable<U>, Observable<Exclude<T, U>>];
/** @internal */
export declare function partition<T>(source: ObservableInput<T>, predicate: (value: T) => boolean): [Observable<T>, Observable<T>];
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