Index: generic/nsf.h
===================================================================
diff -u -r3a246dd237252e81aa7f4a37cba2affb0b9ecf00 -rbd4aa15282abe386464ef276b78f2708f249f333
--- generic/nsf.h	(.../nsf.h)	(revision 3a246dd237252e81aa7f4a37cba2affb0b9ecf00)
+++ generic/nsf.h	(.../nsf.h)	(revision bd4aa15282abe386464ef276b78f2708f249f333)
@@ -263,6 +263,9 @@
 extern int
 NsfNoCurrentObjectError(Tcl_Interp *interp, CONST char *what);
 
+extern int
+NsfGetClassFromObj(Tcl_Interp *interp, Tcl_Obj *objPtr,
+		   Nsf_Class **clPtr, int withUnknown);
 
 #define NSF_LOG_NOTICE 2
 #define NSF_LOG_WARN 1