/**
 * Marks the function as command function of the bot.
 *
 * When the user sends a command starting with / (slash) followed by the same
 * name of the function, the function is executed.
 *
 * @export
 * @param {ICommandDecoratorOpts} [opts] Options for the command decorator.
 * @returns Method Decorator
 */
export declare function command(opts?: ICommandDecoratorOpts): <T extends (...args: any[]) => any = (...args: any[]) => any>(target: any, propName: string, descriptor?: TypedPropertyDescriptor<T> | undefined) => TypedPropertyDescriptor<T> | undefined;