import { ChartAggregatedWidgetOptions, Operation, ValueType } from '@onepoint-yap/dashboard';
import { Observable } from 'rxjs';
import * as i0 from "@angular/core";
export interface AggregationResult {
    operation: Operation;
    values: ({
        key: ValueType;
        value: ValueType;
    } | {
        key: ValueType;
        groupBy: {
            key: ValueType;
            value: ValueType;
        }[];
    })[];
}
export declare class YapAggregationService {
    aggregate(datasource: string[], options: ChartAggregatedWidgetOptions): Observable<AggregationResult>;
    static ɵfac: i0.ɵɵFactoryDeclaration<YapAggregationService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<YapAggregationService>;
}