import { Iterable } from 'ix';
export declare function asIterable<T>(this: T[]): Iterable<T>;
export declare function filterNull<T>(this: Array<T | undefined | null>, callbackfn?: (value: T, index: number, array: Array<T | undefined | null>) => boolean): T[];
declare global  {
    interface Array<T> {
        asIterable: typeof asIterable;
        filterNull: typeof filterNull;
    }
}