import { IInputItem } from '../services/viz-conf';
export interface IUngroupConf {
    fields: string[];
    values: string[];
    aggType: 'sum' | 'avg';
}
export declare class Ungroup {
    private readonly conf;
    private readonly xform;
    private readonly inputCache;
    private readonly indexCache;
    constructor(conf: IUngroupConf, xform: any);
    '@@transducer/result'(v: any): any;
    '@@transducer/step'(res: any, input: IInputItem): any;
}
export declare const ungroup: (conf: IUngroupConf) => (xform: any) => Ungroup;