/**
 * Marks the function as an action of the bot corresponding to any
 * `callback_data` of any `input$()` message.
 *
 * The function will be executed when the user executes an action due to the,
 * for example, a button provided by a message.
 *
 * @export
 * @param {IActionDecoratorOpts} [opts] Options of the action decorator.
 * @returns Method Decorator
 */
export declare function action(opts?: IActionDecoratorOpts): <T extends (...args: any[]) => any = (...args: any[]) => any>(target: any, propName: string, descriptor?: TypedPropertyDescriptor<T> | undefined) => TypedPropertyDescriptor<T> | undefined;