This is available from SqueakMap, but I think it should be added (it's
not
a self-contained module, it's a patch for the debugger). I use it in all
my images, no problems, can't live without it. (It's especially great
for Test
Driven Development).

from preamble:

"Change Set:		DebugCreateMethods-nk
Date:			12 February 2003
Author:			Ned Konz

This little change set adds a 'Create' button to debuggers that pop up
on MNU's. This button writes a stub method containing a halt, then
proceeds the debugger (which will stop at the halt). You can then edit
the source of the method.

Also adds an 'implement in...' submenu to the debugger's call stack's
contextual menu (only for #doesNotUnderstand: messages)."!
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