Each Telegraf instance method has own decorator in `nestjs-telegraf` package. The name of the decorator corresponds to the name of the Telegraf method. For example [`@Hears`](https://telegraf.js.org/classes/telegraf.html#hears), [`@On`](https://telegraf.js.org/classes/telegraf.html#on), [`@Action`](https://telegraf.js.org/classes/telegraf.html#action) and so on.