type HandlerFn = (opt?: {}) => void;
declare class GlobalSpinnerClass {
    private static instance;
    private constructor();
    static getInstance(): GlobalSpinnerClass;
    private startHandlers;
    private stopHandlers;
    private startHandlersMap;
    private stopHandlersMap;
    private isSpinningSrc$;
    isSpinning$: import("rxjs").Observable<boolean>;
    private _isSpinning;
    get isSpinning(): boolean;
    private set isSpinning(value);
    /**
     * Provide taskCallbackFn() and
     * start(), stop() will trigger
     * automatically
     */
    task(taskCallbackFn: () => {}): Promise<void>;
    start(): void;
    stop(): void;
    removeHandler(handlerId: string): void;
    addSpinningEventListener(handleStartSpinFn: HandlerFn, handleStopSpinFn: HandlerFn, handlerId: string): void;
}
export declare const GlobalSpinner: GlobalSpinnerClass;
export {};