import { OnInit, OnDestroy, OnChanges, SimpleChanges, ElementRef, EventEmitter } from '@angular/core';
import { CollapsibleService } from '../services/collapsible.service';
import { CollapsibleEventService } from '../services/collapsible-event.service';
export declare class CollapsibleBodyComponent implements OnInit, OnChanges, OnDestroy {
    private el;
    private collapsibleService;
    private eventService;
    expandedState: string;
    expanded: boolean;
    toggleState: EventEmitter<boolean>;
    constructor(el: ElementRef, collapsibleService: CollapsibleService, eventService: CollapsibleEventService);
    ngOnInit(): void;
    hasContent(): boolean;
    toggleCollapsibleItem(): void;
    ngOnChanges(changes: SimpleChanges): void;
    ngOnDestroy(): void;
}