make into argument for adapter.split keyword-only

Author: LarsKue

bayesflow/adapters/adapter.py

@@ -667,7 +667,7 @@ def shift(self, keys: str | Sequence[str], by: float | np.ndarray):
         self.transforms.append(MapTransform({key: Shift(shift=by) for key in keys}))
         return self
 
-    def split(self, key: str, into: Sequence[str], indices_or_sections: int | Sequence[int] = None, axis: int = -1):
+    def split(self, key: str, *, into: Sequence[str], indices_or_sections: int | Sequence[int] = None, axis: int = -1):
         from .transforms import Split
 
         self.transforms.append(Split(key, into, indices_or_sections, axis))