# Helper functions for nesting updates in Elm

The `Task.Extra` module contains:

```
message : msg -> Cmd msg
message x =
    Task.perform identity (Task.succeed x)
```

Which is a useful way of creating a `Cmd` from a `Msg`.

The `Update` modules provide functions for lifting nested update functions into a
parent update function, following the so-called 'nested TEA' pattern.

The `Update2` module is for update functions that return a new `Model` and a `Cmd`.

The `Update3` module is for update functions that also return an additional 'out message'.

The `Update3Alt` module is for update functions that also return an additional
'out message', but as the second item in the return tuple, instead of the last.

These update functions help with composing update functions together.