import { Subject } from "rxjs";
/**
 * Implement a generic onInit method to perform initialization
 */
export interface OnInit {
    /**
     * Called after object creation to initialize active content.
     * @returns Promise in case of async initialization
     */
    onInit(): Promise<void>;
}
/**
 * Implement a generic onDestroy method to perform cleanup
 */
export interface OnDestroy {
    /**
     * Called before an Object is destroyed. All ressources, listeners, etc should be cleanup here.
     * @returns Promise in case of async destrution
     */
    onDestroy(): Promise<void>;
}
export declare abstract class LifecycleBase implements OnInit, OnDestroy {
    protected _onDestroy$: Subject<boolean>;
    onDestroy$: import("rxjs").Observable<boolean>;
    abstract onInit(): Promise<void>;
    onDestroy(): Promise<void>;
}