import { AsyncOperation } from "../operation";
export interface FilterFn<T, Is extends T = T> {
    (value: T): boolean | Promise<boolean>;
}
export declare function filterNegatable<T>(callbackFn: FilterFn<T>, negate?: boolean): AsyncOperation<T, AsyncIterable<T>>;
export declare function filter<T, Is extends T>(callbackFn: FilterFn<T, Is>): AsyncOperation<T, AsyncIterable<Is>>;
export declare function filter<T>(callbackFn: FilterFn<T>): AsyncOperation<T, AsyncIterable<T>>;