diff --git a/module/core/former/tests/inc/former_tests/subformer_shortcut.rs b/module/core/former/tests/inc/former_tests/subformer_shortcut.rs
index 6f32e8f670..c1d67a0e6b 100644
--- a/module/core/former/tests/inc/former_tests/subformer_shortcut.rs
+++ b/module/core/former/tests/inc/former_tests/subformer_shortcut.rs
@@ -80,21 +80,21 @@ where
     // Former2::_begin( None, Some( self ), on_end )
   }
 
-  #[ inline( always ) ]
-  pub fn _descriptor_former2< Former2, Definition2, Types2 >( self ) ->
-  Former2
-  where
-    Types2 : former::FormerDefinitionTypes
-    <
-      Storage = TemplateParameterDescriptorFormerStorage,
-      Formed = Self,
-      Context = Self,
-    >,
-    Definition2 : former::FormerDefinition< Types = Types2, End = TemplateParameterDescriptorEnd< Definition, Types2 > >,
-    Former2 : former::FormerBegin< Definition2 >,
-  {
-    Former2::_begin( None, Some( self ), TemplateParameterDescriptorEnd::< Definition, Types2 >::default() )
-  }
+  // #[ inline( always ) ]
+  // pub fn _descriptor_former2< Former2, Definition2, Types2 >( self ) ->
+  // Former2
+  // where
+  //   Types2 : former::FormerDefinitionTypes
+  //   <
+  //     Storage = TemplateParameterDescriptorFormerStorage,
+  //     Formed = Self,
+  //     Context = Self,
+  //   >,
+  //   Definition2 : former::FormerDefinition< Types = Types2, End = TemplateParameterDescriptorEnd< Definition, Types2 > >,
+  //   Former2 : former::FormerBegin< Definition2 >,
+  // {
+  //   Former2::_begin( None, Some( self ), TemplateParameterDescriptorEnd::default() )
+  // }
 
   // xxx2 : move to a trait and make easier to use subformer, trait with generic interface of a container should help
 
@@ -102,7 +102,7 @@ where
   pub fn descriptor( self, name : &str ) ->
   TemplateParameterDescriptorSubformer< Self, impl TemplateParameterDescriptorSubformerEnd< Self > >
   {
-    self._descriptor_former2
+    self._descriptor_former
     ::
     <
       TemplateParameterDescriptorFormer< _ >,
@@ -114,6 +114,33 @@ where
   }
 }
 
+trait SubFormerTrait< Definition, Definition2, Types2 >
+where
+  Types2 : former::FormerDefinitionTypes
+  <
+    Storage = TemplateParameterDescriptorFormerStorage,
+    Formed = Self,
+    Context = Self,
+  >,
+  Definition2 : former::FormerDefinition< Types = Types2, End = TemplateParameterDescriptorEnd< Definition, Types2 > >,
+  Self : former::FormerBegin< Definition2 >,
+{
+}
+
+impl< T, Definition, Definition2, Types2 > SubFormerTrait< Definition, Definition2, Types2 >
+for T
+where
+  Types2 : former::FormerDefinitionTypes
+  <
+    Storage = TemplateParameterDescriptorFormerStorage,
+    Formed = Self,
+    Context = Self,
+  >,
+  Definition2 : former::FormerDefinition< Types = Types2, End = TemplateParameterDescriptorEnd< Definition, Types2 > >,
+  Self : former::FormerBegin< Definition2 >,
+{
+}
+
 /// Handles the completion of the subformer for `TemplateParameterDescriptor`.
 pub struct TemplateParameterDescriptorEnd< Definition, Types2 >
 {
@@ -139,7 +166,8 @@ where
   Definition : former::FormerDefinition,
   Definition::Types : former::FormerDefinitionTypes
   <
-    Storage = TemplateParametersFormerStorage
+    Storage = TemplateParametersFormerStorage,
+    // Storage = Storage,
   >,
   Types2 : former::FormerDefinitionTypes
   <