Visualization: ignore wypp wrapper

```python
from wypp import *

@record
class Item:
    name: str

item1 = Item('foo')

@record
class Items:
    items: list[Item]

sampleInvoice = Items([item1])
print(sampleInvoice)
```

When visualizing this program, `sampleItems.items` is displayed as class WyppTypeCheck, leading to a very cluttered visualization. We should ignore all type checking wrapper classes.
