import { OnDestroy, OnInit, TemplateRef, ViewContainerRef } from '@angular/core';
import { SuspenseIfContext } from '../models/suspense';
import { SuspenseService } from '../services/suspense.service';
import * as i0 from "@angular/core";
export declare abstract class SuspenseIfDirective<T> implements OnInit, OnDestroy {
    private subscriptions;
    private embeddedViewRef;
    protected templateRef: TemplateRef<SuspenseIfContext<T>>;
    protected viewContainer: ViewContainerRef;
    protected suspenseService: SuspenseService;
    abstract get isVisible(): boolean;
    abstract get value(): T;
    ngOnInit(): void;
    ngOnDestroy(): void;
    private updateView;
    static ɵfac: i0.ɵɵFactoryDeclaration<SuspenseIfDirective<any>, never>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<SuspenseIfDirective<any>, never, never, {}, {}, never, never, false, never>;
}