import { RowsGrouping } from './types';
import { ObjectForExtending } from '../types/utils.type';

export declare const isMergedGroupingView: <RowType extends ObjectForExtending, SummaryRowType>(rowsGrouping: RowsGrouping<RowType, SummaryRowType> | undefined, groupByArr: string[] | undefined) => boolean;
export declare function flattenRowsByGroups<RowType extends ObjectForExtending>(rows: readonly RowType[], groupByArr: readonly string[]): readonly RowType[];
export declare function createGroupPathValue<RowType extends ObjectForExtending>(groupByArr: readonly string[], depth: number): (row: RowType) => unknown;
export declare function createTopGroupOrdinalGetter<RowType extends ObjectForExtending>(topKey: string, rowsRef: {
    readonly current: readonly RowType[];
}): (args: {
    row: RowType;
}) => string | number;
export declare function wrapMergedGroupSelecting<S>(selecting: S, topKey: string, flattenedRowsRef: {
    readonly current: readonly ObjectForExtending[];
}): S;