Is it possible to access the `$measurements` property in a test case?

```
class Performance
{
    private static $measurements = [];

    public static function createMeasurement()
    {
        // ...
    }
}

```

So far I tries something like this:

```
$reflection = new \ReflectionClass(get_class(Performance));
$property = $reflection->getProperty('measurements');
$property->setAccessible(true);

```

But this does not work, because `Use of undefined constant Performance - assumed 'Performance'`. How do I tell php to get an object from a static class?