/**
 * The custom element for this plugin's toolbar, a component which displays in
 * the host `<perspective-viewer>`'s status bar when this plugin is active.
 * In the case of Datagrid, this comprises "Editable" and "Scroll Lock" toggle
 * buttons.
 */
export declare class HTMLPerspectiveViewerDatagridToolbarElement extends HTMLElement {
    private _initialized;
    connectedCallback(): void;
}