Doesn't actually exist
Thank you. I was a tad bit surprised that there would be a proc for power in the case of generalIZED linear models (glims) as opposed to generaL linear models (glm).

Anyhoo, with this out of the way the answer is simple: there is no such proc because there are no closed-form expressions for the power of generalized, linear mixed effects models. Power in these cases can only be approximated by simulation.


Ambassador to the humans
Why so people do this? It is vexing.
Either they don't want somebody searching and seeing that they asked the question or they're just embarrassed. Either way I'm not a supporter. This is more ban-able in my book than whatever that one person (you know who I'm talking about) does.