# `ASM.Extensions.Rendering.Sinks.Callback`
[🔗](https://github.com/nshkrdotcom/agent_session_manager/blob/v0.9.2/lib/asm/extensions/rendering/sinks/callback.ex#L1)

Sink that forwards events and rendered iodata to a callback function.

Options:
- `:callback` (required): `(event, iodata) -> term()`

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