import { Panel } from '@lumino/widgets';
export declare class SessionWidget extends Panel {
    private readonly BUTTON_TEXT;
    private readonly BUTTON_TITLE;
    private stopEl;
    private statsActiveEl;
    private statsDeadEl;
    private statsMemoryEl;
    private readonly spinnerWidget;
    private _sparkUiWebUrl;
    constructor();
    set sparkUiWebUrl(url: string);
    disableStop(): void;
    enableStop(): void;
    showSpinner(): void;
    hideSpinner(): void;
    updateStats(data: {
        isActive: boolean;
        activeTasks: number;
        memoryUsed: number;
    }[]): void;
    private createStats;
    private createStop;
    private onStopClicked;
}