Index: generic/nsfCmdDefinitions.c
===================================================================
diff -u -N -ra2021fcacd45bfbbe0d2dc11061e2a374c49726f -r6a52879a99a2fd5bc2e987d5b1149f69d35f02d9
--- generic/nsfCmdDefinitions.c	(.../nsfCmdDefinitions.c)	(revision a2021fcacd45bfbbe0d2dc11061e2a374c49726f)
+++ generic/nsfCmdDefinitions.c	(.../nsfCmdDefinitions.c)	(revision 6a52879a99a2fd5bc2e987d5b1149f69d35f02d9)
@@ -1,8 +1,9 @@
 /*
  * nsfCmdDefinitions.c --
  *
- *      Provide an API for registering method definitions
- *      and obtaining these meta-data for introspection.
+ *      Provide an API for registering method definitions and obtaining these
+ *      meta-data for introspection. Method definitions are shared by all
+ *      threads/interps. Access is governed by a mutex lock.
  *
  * Copyright (C) 2014-2016 Gustaf Neumann
  * Copyright (C) 2016 Stefan Sobernig