import { KeyValue } from '@angular/common';
import { PipeTransform } from '@angular/core';
import * as i0 from "@angular/core";
/**
 * Filters properties from a keyvalue pipe with existing values.
 * @param items The array of objects transformed through the KeyValuePipe
 * @param whitelist A map of properties acceptable to return, in order to filter unwanted properties
 * @returns list of keyvalue pairs, sorted on the keys from original template order
 */
export declare class FilterEmptyPipe implements PipeTransform {
    transform<T extends KeyValue<string, unknown>>(items: T[], whitelist: {
        [id: string]: unknown;
    }): T[];
    static ɵfac: i0.ɵɵFactoryDeclaration<FilterEmptyPipe, never>;
    static ɵpipe: i0.ɵɵPipeDeclaration<FilterEmptyPipe, "filterEmpty">;
}