I have a TXXLog Trait where I have defined the following methods instance side. info: aString warn: aString debug: aString error: aString This worked well with my services where I had XXService uses: TXXLog services have a default class side method that return the Default instance. Now, I had a class where I wanted to use the trait from the class side as well. But then, after Googling a bit, I found that there was the instance side trait and the class side trait. What is the best practice when one wants to use, say, the TXXLog trait on the class side? For my particular case, I put the info: warn: ... methods on the class side of my trait and the instance side one do a self class info: aString etc. Is that the right way to do it? Phil