# `Masu.History.Memory`
[🔗](https://github.com/hattoriai/masu/blob/v0.7.0/lib/masu/history.ex#L260)

The history of grids in memory, for development and tests: it lasts as
long as the node, and every grid of the node shares it. Not for
production.

Start it in your supervision tree (or in `test_helper.exs`):

    children = [Masu.History.Memory, ...]

# `child_spec`

Returns a specification to start this module under a supervisor.

See `Supervisor`.

# `clear`

```elixir
@spec clear() :: :ok
```

Forgets every entry.

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