import { LoggerService } from "@nova-ui/bits";
import { RegistryService } from "./registry-service";
import { IProportionalDonutContentAggregatorDefinition } from "../functions/proportional-aggregators/types";
import * as i0 from "@angular/core";
export declare class ProportionalContentAggregatorsRegistryService extends RegistryService<IProportionalDonutContentAggregatorDefinition> {
    constructor(logger: LoggerService);
    getItemKey(item: IProportionalDonutContentAggregatorDefinition): string;
    static ɵfac: i0.ɵɵFactoryDeclaration<ProportionalContentAggregatorsRegistryService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<ProportionalContentAggregatorsRegistryService>;
}