Stop using preserveTypeOf

src/preserves/private/preserves_schema_nim.nim

@@ -331,7 +331,7 @@ proc preserveTypeOf(known: var TypeTable; sn: SchemaNode; name = ""): PNode =
   of snkRef:
     result = ident $sn
   else:
-    result = nn(nkDistinctTy, ident"Preserve")
+    result = nimTypeOf(known, sn, name)
   result.comment = "``" & $sn & "``"
 
 proc generateProcs(result: var seq[PNode]; name: string; sn: SchemaNode) =
@@ -396,7 +396,7 @@ proc generateNimFile*(scm: Schema; path: string) =
     if def.isConst:
       constSection.add toConst(name, def)
     else:
-      let t = preserveTypeOf(knownTypes, def, name)
+      let t = nimTypeOf(knownTypes, def, name)
       case def.kind
       of snkAtom:
         knownTypes[name] = nkTypeDef.newNode.add(