export function aggregateGet(table: any, ops: any, get: any): any;
export function aggregate(table: any, ops: any, result: any): any;
export function reducers(ops: any, stream: any): any[];
export function reduceFlat(table: any, reducer: any): any;
export function reduceGroups(table: any, reducer: any, groups: any): any[];
export function groupOutput(cols: any, groups: any): void;