import { ApplicationRef, ComponentFactoryResolver, Injector } from '@angular/core';
import { Observable } from 'rxjs';
import { DropdownOptions } from './dropdown.model';
import * as i0 from "@angular/core";
export declare class DropdownService {
    private document;
    private platformId;
    private injector;
    private appRef;
    private cfResolver;
    constructor(document: any, platformId: any, injector: Injector, appRef: ApplicationRef, cfResolver: ComponentFactoryResolver);
    /**
     * showOverlay runs overlay with specified component
     * @param config
     * contains dropdown options
     */
    showDropdown(config: DropdownOptions): Observable<any>;
    static ɵfac: i0.ɵɵFactoryDeclaration<DropdownService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<DropdownService>;
}