import { ReflectiveInjector, Injector, Provider, ComponentFactoryResolver, ApplicationRef } from '@angular/core';
import { DomPortalHost } from '@angular/cdk/portal';
export declare class PortalUtil {
    private document;
    private componentFactoryResolver;
    private appRef;
    private injector;
    constructor(document: any, componentFactoryResolver: ComponentFactoryResolver, appRef: ApplicationRef, injector: Injector);
    resolveInputs(provides: Provider[]): ReflectiveInjector;
    genHost(injector?: Injector, nativeDom?: any): DomPortalHost;
}