export type ReshapeKey = string | number;
export type ReshapeAccessor<T> = (keyof T & string) | ((row: T) => unknown);
export type ReshapeAggregate<T> = 'sum' | 'count' | 'min' | 'max' | ((values: unknown[], rows: T[]) => unknown);
export type PivotFill = string | number | boolean | null | ((value: string, index: ReshapeKey, column: ReshapeKey) => unknown);
export interface PivotRowsOptions<T extends Record<string, any>> {
    index: ReshapeAccessor<T>;
    columns: ReshapeAccessor<T>;
    values: readonly (keyof T & string)[];
    aggregate?: ReshapeAggregate<T>;
    fill?: PivotFill;
    indexValues?: readonly ReshapeKey[];
    columnValues?: readonly ReshapeKey[];
    normalizeKey?: (value: unknown) => ReshapeKey;
    missingKey?: 'empty' | 'skip' | 'error';
    separator?: string;
    indexName?: string;
    columnName?: (valueField: string, column: ReshapeKey) => string;
}
export type PivotRow = Record<string, unknown>;
export declare function pivotRows<T extends Record<string, any>>(rows: readonly T[], options: PivotRowsOptions<T>): PivotRow[];