import { BreakpointObserver } from '@angular/cdk/layout';
import { CdkScrollable, ScrollDispatcher } from '@angular/cdk/scrolling';
import { AfterContentInit, ChangeDetectorRef, ElementRef, InjectionToken, NgZone, OnDestroy, QueryList } from '@angular/core';
import { Subject } from 'rxjs';
/**
 * Throws an exception if more than one SbbSidebarBase is provided.
 * @docs-private
 */
export declare function throwSbbDuplicatedSidebarError(): void;
/**
 * Used to provide a sidebar container to a sidebar while avoiding circular references.
 * @docs-private
 */
export declare const SBB_SIDEBAR_CONTAINER: InjectionToken<unknown>;
/** @docs-private */
export interface SbbSidebarMobileCapableContainer {
    _mobile: boolean;
}
export declare abstract class SbbSidebarContentBase extends CdkScrollable {
    protected constructor(elementRef: ElementRef<HTMLElement>, scrollDispatcher: ScrollDispatcher, ngZone: NgZone);
}
/** This component corresponds to a sidebar. */
export declare abstract class SbbSidebarBase {
    _container: SbbSidebarMobileCapableContainer;
    abstract _mobileChanged(mobile: boolean): void;
    protected constructor(_container: SbbSidebarMobileCapableContainer);
}
/**
 * This is the parent component to one or two `<sbb-sidebar>`s that validates the state internally
 * and coordinates the backdrop and content styling.
 */
export declare abstract class SbbSidebarContainerBase<T extends SbbSidebarBase> implements AfterContentInit, OnDestroy, SbbSidebarMobileCapableContainer {
    protected _ngZone: NgZone;
    protected _changeDetectorRef: ChangeDetectorRef;
    protected _breakpointObserver: BreakpointObserver;
    _mobile: boolean;
    /** The sidebar child */
    get sidebar(): T | null;
    /** Reference to the CdkScrollable instance that wraps the scrollable content. */
    get scrollable(): CdkScrollable;
    protected constructor(_ngZone: NgZone, _changeDetectorRef: ChangeDetectorRef, _breakpointObserver: BreakpointObserver);
    /** All sidebars, also nested sidebars included **/
    _allSidebars: QueryList<T>;
    /** Sidebars that belong to this container. */
    _sidebars: QueryList<T>;
    _content: SbbSidebarContentBase;
    _userContent: SbbSidebarContentBase;
    /** The sidebar */
    protected _sidebar: T | null;
    /** Emits when the component is destroyed. */
    protected readonly _destroyed: Subject<void>;
    ngAfterContentInit(): void;
    protected _watchBreakpointObserver(): void;
    private _updateMobileState;
    ngOnDestroy(): void;
    /** Validate the state of the sidebar children components. */
    protected _validateSidebars(): void;
}