import { Injector } from '@angular/core';
import { CompilerService } from '@cisstech/nge/services';
import { Observable } from 'rxjs';
import { NgeElementDef } from './nge-element';
import * as i0 from "@angular/core";
export declare class NgeElementService {
    private readonly injector;
    private readonly compiler;
    private readonly registry;
    private readonly defineds;
    private readonly promises;
    constructor(injector: Injector, compiler: CompilerService, elements: NgeElementDef[]);
    listUnloadeds(): string[];
    /**
     * Allows to lazy load a element given it's selector (i.e. tagname).
     * If the element selector has been registered, it's according module
     * will be fetched lazily
     * @param selector selector of the element to load.
     */
    loadElement(selector: string): Promise<void>;
    loadElements(selectors: string[]): Observable<void[]>;
    static ɵfac: i0.ɵɵFactoryDeclaration<NgeElementService, [null, null, { optional: true; }]>;
    static ɵprov: i0.ɵɵInjectableDeclaration<NgeElementService>;
}