import { AfterContentInit, ChangeDetectorRef, OnDestroy, OnInit, QueryList } from '@angular/core';
import { MatIconRegistry } from '@angular/material/icon';
import { DomSanitizer } from '@angular/platform-browser';
import { Destroyable } from '../../common/destroyable';
import { SidebarGroupToken } from './sidebar-group/sidebar-group.component';
import { SidebarItemToken } from './sidebar-item/sidebar-item.component';
export declare class SidebarContentComponent extends Destroyable implements OnInit, AfterContentInit, OnDestroy {
    private _matIconRegistry;
    private _domSanitizer;
    private _change;
    groups: QueryList<SidebarGroupToken>;
    items: QueryList<SidebarItemToken>;
    private _isCollapsed;
    private _existingGroups;
    private _groupObserver;
    constructor(_matIconRegistry: MatIconRegistry, _domSanitizer: DomSanitizer, _change: ChangeDetectorRef);
    ngOnInit(): void;
    ngAfterContentInit(): void;
    ngOnDestroy(): void;
    private _setGroupExpanded;
    get isCollapsed(): boolean;
    set isCollapsed(value: boolean);
}