import { EventEmitter, OnInit, TemplateRef } from '@angular/core';
import { AtCollapseComponent } from '../at-collapse.component';
export declare class AtCollapseItemComponent implements OnInit {
    private at_collapse;
    ngOnInit(): void;
    private _atOpen;
    atTitle: string | TemplateRef<void>;
    atDisabled: boolean;
    readonly atOpenChange: EventEmitter<{}>;
    readonly titleIsString: boolean;
    open(): void;
    atOpen: boolean;
    constructor(at_collapse: AtCollapseComponent);
    readonly expandState: string;
}