import { NgForOf } from '@angular/common';
import * as i0 from "@angular/core";
export declare class TrackByFieldDirective<T> {
    private ngFor;
    private defaultKey;
    ngForJpTrackByField: keyof T;
    constructor(ngFor: NgForOf<T>, defaultKey: any);
    static ɵfac: i0.ɵɵFactoryDeclaration<TrackByFieldDirective<any>, [{ host: true; }, null]>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<TrackByFieldDirective<any>, "[ngForJpTrackByField]", never, { "ngForJpTrackByField": { "alias": "ngForJpTrackByField"; "required": false; }; }, {}, never, never, false, never>;
}
//# sourceMappingURL=track-by-field.directive.d.ts.map