import { BreakpointObserver, BreakpointState } from '@angular/cdk/layout';
import CustomBottomNavEventEmitter from './CustomBottomNavEventEmitter';
export declare class BottomNavService {
    private _breakpointObserver;
    private _breakpointWidth;
    private _breakpointChangeEmitterSubscription;
    bottomNavVisible: CustomBottomNavEventEmitter<boolean>;
    constructor(_breakpointObserver: BreakpointObserver);
    /**
     * Set a new breakpoint width
     * @param value The breakpoint width
     */
    set breakpointWidth(value: string);
    /**
     * Start the observation of the breakpoint changes
     */
    startBreakpointObservation(): void;
    /**
     * Handle the size change events
     * @param breakpoint The breakpoint state
     */
    handleSizeChange(breakpoint: BreakpointState): void;
}