import { OnDestroy, TemplateRef } from '@angular/core';
export declare abstract class SpeakerNotesTarget {
    abstract attach(template: TemplateRef<any>): () => void;
}
export declare class SpeakerNotesDirective implements OnDestroy {
    private readonly template;
    private readonly target;
    private detach;
    constructor(template: TemplateRef<any>, target: SpeakerNotesTarget);
    ngOnDestroy(): void;
}