Remove preview helper method

pyiron_workflow/mixin/preview.py

@@ -15,7 +15,7 @@
 import inspect
 from abc import ABC, abstractmethod
 from collections.abc import Callable
-from functools import lru_cache, wraps
+from functools import lru_cache
 from typing import (
     TYPE_CHECKING,
     Any,
@@ -82,22 +82,6 @@ def preview_io(cls) -> DotDict[str, dict]:
         )
 
 
-def builds_class_io(subclass_factory: Callable[..., type[HasIOPreview]]):
-    """
-    A decorator for factories producing subclasses of `HasIOPreview` to invoke
-    :meth:`preview_io` after the class is created, thus ensuring the IO has been
-    constructed at the class level.
-    """
-
-    @wraps(subclass_factory)
-    def wrapped(*args, **kwargs):
-        node_class = subclass_factory(*args, **kwargs)
-        node_class.preview_io()
-        return node_class
-
-    return wrapped
-
-
 class ScrapesIO(HasIOPreview, ABC):
     """
     A mixin class for scraping IO channel information from a specific class method's

pyiron_workflow/nodes/transform.py

@@ -16,7 +16,6 @@
 from pyiron_snippets.factory import classfactory
 
 from pyiron_workflow.channels import NOT_DATA, NotData
-from pyiron_workflow.mixin.preview import builds_class_io
 from pyiron_workflow.nodes.static_io import StaticNode
 
 
@@ -107,7 +106,6 @@ def _build_outputs_preview(cls) -> dict[str, Any]:
         return {f"item_{i}": None for i in range(cls._length)}
 
 
-@builds_class_io
 @classfactory
 def inputs_to_list_factory(n: int, use_cache: bool = True, /) -> type[InputsToList]:
     return (
@@ -137,10 +135,11 @@ def inputs_to_list(n: int, /, *node_args, use_cache: bool = True, **node_kwargs)
         InputsToList: An instance of the dynamically created :class:`InputsToList`
             subclass.
     """
-    return inputs_to_list_factory(n, use_cache)(*node_args, **node_kwargs)
+    cls = inputs_to_list_factory(n, use_cache)
+    cls.preview_io()
+    return cls(*node_args, **node_kwargs)
 
 
-@builds_class_io
 @classfactory
 def list_to_outputs_factory(n: int, use_cache: bool = True, /) -> type[ListToOutputs]:
     return (
@@ -172,7 +171,10 @@ def list_to_outputs(
         ListToOutputs: An instance of the dynamically created :class:`ListToOutputs`
             subclass.
     """
-    return list_to_outputs_factory(n, use_cache)(*node_args, **node_kwargs)
+
+    cls = list_to_outputs_factory(n, use_cache)
+    cls.preview_io()
+    return cls(*node_args, **node_kwargs)
 
 
 class InputsToDict(FromManyInputs, ABC):