# `BB.Controller.Action.Callback`
[🔗](https://github.com/beam-bots/bb/blob/main/lib/bb/controller/action.ex#L46)

Action that calls an arbitrary function.

# `t`

```elixir
@type t() :: %BB.Controller.Action.Callback{
  handler: (BB.Message.t(), BB.Controller.Action.Context.t() -&gt; any())
}
```

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*Consult [api-reference.md](api-reference.md) for complete listing*
