import { ComponentRef } from '@angular/core';
import { Observable } from 'rxjs';
export declare abstract class WorkspaceTabRef<T, R = any> {
    referenceId: number;
    componentRef: ComponentRef<T>;
    abstract onTabVisit(): Observable<T>;
    abstract onTabLeave(): Observable<void>;
    abstract onClose(): Observable<R | undefined>;
    abstract onOpen(): Observable<void>;
    abstract minimize(): void;
    abstract close(data?: R): void;
}