# PrepareForLines(IEnumerable\<string>)

Method in [LineProviderBehaviour](/2.2/api/csharp/yarn.unity/yarn.unity.lineproviderbehaviour.md)

## Summary

Signals to the line provider that lines with the provided line IDs may be presented shortly.

```csharp
public virtual void PrepareForLines(IEnumerable<string> lineIDs)
```

## Remarks

Subclasses of [LineProviderBehaviour](/2.2/api/csharp/yarn.unity/yarn.unity.lineproviderbehaviour.md) can override this to prepare any neccessary resources needed to present these lines, like pre-loading voice-over audio. The default implementation does nothing.

{% hint style="info" %}
Not every line may run; this method serves as a way to give the line provider advance notice that a line *may* run, not *will* run.
{% endhint %}

When this method is run, the value returned by the [LinesAvailable](/2.2/api/csharp/yarn.unity/yarn.unity.lineproviderbehaviour/yarn.unity.lineproviderbehaviour.linesavailable.md) property should change to false until the necessary resources have loaded.

## Parameters

| Name                          | Description                                                         |
| ----------------------------- | ------------------------------------------------------------------- |
| `IEnumerable<string>` lineIDs | A collection of line IDs that the line provider should prepare for. |


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