import { OnInit } from '@angular/core';
import { CdkVirtualScrollViewport } from '@angular/cdk/scrolling';
import * as i0 from "@angular/core";
/**
 * A patch to fix the issue of sticky header position getting affected
 * by transform, which is due to transform making the element
 * a [containing block](https://developer.mozilla.org/en-US/docs/Web/CSS/Containing_block).
 *
 * It intercepts style assignments on the content wrapper, and converts
 * transform: translateY(value) to top: value, to avoid making the content
 * wrapper a containing block for sticky positioned children.
 *
 * @see
 * https://github.com/angular/components/issues/14833
 * https://github.com/angular/components/issues/18240
 * https://github.com/angular/components/issues/21576
 * https://github.com/angular/components/issues/28584
 */
export declare class CdkVirtualScrollViewportFixDirective implements OnInit {
    private cdkViewport;
    constructor(cdkViewport: CdkVirtualScrollViewport);
    ngOnInit(): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<CdkVirtualScrollViewportFixDirective, never>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<CdkVirtualScrollViewportFixDirective, "cdk-virtual-scroll-viewport", never, {}, {}, never, never, true, never>;
}