import { NgZone } from '@angular/core';
import { BindingData, BindingList } from '@farris/devkit';
import { ColumnComponent } from '@progress/kendo-angular-grid';
export declare class GridColumnAggregateDirective {
    private column;
    private ngZone;
    aggregate: string | boolean;
    readonly field: string;
    private readonly aggrType;
    constructor(column: ColumnComponent, ngZone: NgZone);
    recalculateSummary(bindingList: BindingList): void;
    updateFooter(content: any): void;
}
export declare class GridSummaryDirective {
    private bindingData;
    summary: string;
    constructor(bindingData: BindingData);
}