I suggest you look in Cuis list archives 
http://cuis-smalltalk.org/mailman/listinfo/cuis-dev_cuis-smalltalk.org

Look all Phil say and do.
By the way, what Squeak version use you ?
Must made time for re take Ometa, could share any are you doing ?

Edgar
@morplenauta

> On May 16, 2017, at 09:33, JOHN SARKELA <wiljo at mac.com> wrote:
> 
> Hi,
> 
> I’ve been experimenting with OMeta/2. It’s a lot of fun, but there is a reference to the undefined method OMeta2Compiler>>from:class:context:notifying. I implemented this as an empty method and things appear to be working. Could anyone enlighten me as to the intention of this message and why the reference to it exists in the code base?
> 
> John Sarkela
>