Index: library/nx/nx.tcl
===================================================================
diff -u -r18d4d9c1a99310c3fb9b2f2bed03e9d59fb30d30 -r0d35d1ccd86f2b72296ff01d0d83747ca1c0de65
--- library/nx/nx.tcl	(.../nx.tcl)	(revision 18d4d9c1a99310c3fb9b2f2bed03e9d59fb30d30)
+++ library/nx/nx.tcl	(.../nx.tcl)	(revision 0d35d1ccd86f2b72296ff01d0d83747ca1c0de65)
@@ -1235,25 +1235,6 @@
   proc createBootstrapAttributeSlots {} {}
 
   ##################################################################
-  # create user-level converter/checker based on ::nsf primitves
-  ##################################################################
-
-  Slot method type=baseclass {name value} {
-    # note, that we cannot use "nsf::is baseclass ..." here, since nsf::is call this converter
-    if {![::nsf::isobject $value] || ![::nsf::dispatch $value ::nsf::methods::object::info::is baseclass]} {
-      error "expected baseclass but got \"$value\" for parameter $name"
-    }
-    return $value
-  }
-
-  Slot method type=metaclass {name value} {
-    if {![::nsf::isobject $value] || ![::nsf::dispatch $value ::nsf::methods::object::info::is metaclass]} {
-      error "expected metaclass but got \"$value\" for parameter $name"
-    }
-    return $value
-  }
-
-  ##################################################################
   # Create a mixin class to overload method "new" such it does not
   # allocate new objects in ::nx::*, but in the specified object
   # (without syntactic overhead).