import { GridTools } from './GridTools';
import { ExtensionBase } from '../ExtensionBase';
export declare class GridExtension extends ExtensionBase {
    static getName: () => string;
    private sharedToolbar;
    gridTools: GridTools;
    state: {
        isActive: boolean;
    };
    switchMode(): void;
    added(): Promise<void>;
    deleted(): void;
    constructor(viewerName: string, options: {
        saveStateHandler?: (stateName: string, state: any) => void;
        restoreStateHandler?: (stateName: string, state: any) => Promise<any>;
    });
    initKeymap(): void;
    sharedToolbarRender(container: HTMLElement): void;
    private onLoaded;
}