import { GroupByPipe } from './group-by';
import * as i0 from "@angular/core";
export declare class GroupByImpurePipe extends GroupByPipe {
    static ɵfac: i0.ɵɵFactoryDeclaration<GroupByImpurePipe, never>;
    static ɵpipe: i0.ɵɵPipeDeclaration<GroupByImpurePipe, "groupByImpure", false>;
}