import { PipeTransform } from '@angular/core';
import { GridType } from '../common/grid.interface';
import { IgxGridBaseDirective } from '../grid-base.directive';
import { GridBaseAPIService } from '../api.service';
/** @hidden */
export declare class IgxGridDetailsPipe implements PipeTransform {
    private gridAPI;
    constructor(gridAPI: GridBaseAPIService<IgxGridBaseDirective & GridType>);
    transform(collection: any[], hasDetails: boolean, expansionStates: Map<any, boolean>, pipeTrigger: number): any[];
    protected addDetailRows(collection: any[], expansionStates: Map<any, boolean>): any[];
    protected isExpanded(states: Map<any, boolean>, record: any): boolean;
}