apply Black v23.1.0 formatting changes

unwind/models.py

@@ -41,7 +41,6 @@ def fields(class_or_instance):
     # XXX this might be a little slow (not sure), if so, memoize
 
     for f in _fields(class_or_instance):
-
         if f.name == "_is_lazy":
             continue
 
@@ -108,7 +107,6 @@ def asplain(
 
     d: JSONObject = {}
     for f in fields(o):
-
         if filter_fields is not None and f.name not in filter_fields:
             continue
 
@@ -156,7 +154,6 @@ def fromplain(cls: Type[T], d: dict[str, Any], *, serialized: bool = False) -> T
 
     dd: JSONObject = {}
     for f in fields(cls):
-
         target = f.type
         otype = optional_type(f.type)
         is_opt = otype is not None