/**
 * Marks the function as help function of the bot.
 * The function will be executed when user sends a `/help` command.
 *
 * **NOTE**: You may just have a function named `help` in your class to make
 * it the function will respond to the `/help` command. Use this decorator to
 * mark another function as `/help`.
 *
 * @export
 * @returns Method Decorator
 */
export declare function help(): <T extends Func<any, any[]> = Func<any, any[]>>(target: any, propName: string, descriptor?: TypedPropertyDescriptor<T> | undefined) => TypedPropertyDescriptor<T> | undefined;