import { EmptyToolbox } from './toolbox';
/**
 * An extension will add functionality to the toolbox that each command will receive.
 */
export declare class Extension {
    /** The name of the extension. */
    name?: string;
    /** The description. */
    description?: string;
    /** The file this extension comes from. */
    file?: string;
    /** The function used to attach functionality to the toolbox. */
    setup?: (toolbox: EmptyToolbox) => void | Promise<void>;
}