import { AfterContentInit, QueryList, ElementRef } from '@angular/core';
import { NavigationItem } from './navigation-item.component';
/**
 * `SideNavMenu` provides a method to group `SideNavItem`s under a common heading.
 */
export declare class NavigationMenu implements AfterContentInit {
    /**
     * Heading for the gorup
     */
    title: string;
    /**
     * Controls the visibility of the child `SideNavItem`s
     */
    expanded: boolean;
    navigationItems: QueryList<NavigationItem>;
    navigationNativeItems: QueryList<ElementRef>;
    childrenHeight: number;
    ngAfterContentInit(): void;
    toggle(): void;
}