# _PropertyRunNotify
<span class="source-link">[[Source]](src/pony_check/property_helper.md#L-0-2)</span>

Simple callback for notifying the runner
that a run completed.


```pony
interface val _PropertyRunNotify
```

## Public Functions

### apply
<span class="source-link">[[Source]](src/pony_check/property_helper.md#L-0-7)</span>


```pony
fun box apply(
  round: (_Shrink val | _Run val),
  success: Bool val)
: None val
```
#### Parameters

*   round: ([_Shrink](pony_check-_Shrink.md) val | [_Run](pony_check-_Run.md) val)
*   success: [Bool](builtin-Bool.md) val

#### Returns

* [None](builtin-None.md) val

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