import { ScrollStrategy, OverlayRef } from '@angular/cdk/overlay';
import * as i0 from "@angular/core";
/** Scroll strategy that scrolls only overflowed dialog (prevent inner scroll) */
export declare class DialogScrollStrategy implements ScrollStrategy {
    private _document;
    private _overlayRef;
    private _previousBodyOverflow;
    constructor();
    /** Attaches this scroll strategy to an overlay. */
    attach(overlayRef: OverlayRef): void;
    /** scroll only dialog overlay */
    enable(): void;
    disable(): void;
    private _setOverlayStyle;
    static ɵfac: i0.ɵɵFactoryDeclaration<DialogScrollStrategy, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<DialogScrollStrategy>;
}
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