import { AfterViewInit, ChangeDetectorRef, EventEmitter } from '@angular/core';
import { NzTreeComponent } from 'ng-zorro-antd/tree';
import { HttpClient } from '@angular/common/http';
export declare class GnTreeDirective implements AfterViewInit {
    private tree;
    private http;
    private changeDetectorRef;
    url: string;
    valueField: string;
    textField: string;
    rootNode: any;
    initialed: EventEmitter<any>;
    constructor(tree: NzTreeComponent, http: HttpClient, changeDetectorRef: ChangeDetectorRef);
    reloadSelectNode(): void;
    ngAfterViewInit(): void;
    private initRoot;
    private expandNode;
    private loadNodes;
}