[Pharo-project] Compiler question

Hello all, I am starting to port some code generating code of mine, and ran into something that (on Dolphin) uses Compiler class>>compile:in:, and the comment suggests that it creates a compiled method object without adding it to the class' method dictionary. Similar methods in Behavior do the same thing and then add the method to the dictionary. Are similar things happening in Pharo? It looks that way to me, but an expert confirmation or warning would be appreciated. Bill