# `Igniter.Extension`
[🔗](https://github.com/ash-project/igniter/blob/v0.8.3/lib/igniter/extension.ex#L5)

Alter igniter's behavior by adding new functionality.

This is used to allow frameworks to modify things like
the conventional location of files.

# `proper_location`

```elixir
@callback proper_location(
  Igniter.t(),
  module(),
  Keyword.t()
) :: {:ok, Path.t()} | :error
```

Choose a proper location for any given module.

Possible return values:

- `{:ok, path}`: The path where the module should be located.
- `:error`: It should go in the default place, or according to other extensions.
- `:keep`: Keep the module in the same location, unless another extension has a place for it, or its just been created.

---

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