findLocalScopes(node, null) provides all local variables in the scope ignoring node's position

```python
def myfunc(arg):
    y = 1
    x = 2
```

`findLocalScopes(node, null)` returns always `[arg, y, x]` for a node inside `myfunc(arg)`

See SLLanguage.findLocalScopes() how it should be done collecting only the local variables already defined.