Odile,

 

Please disregard this message, if I'm beating a dead horse.  It was in disgust that I deleted your messages prematurely yesterday.  I had not at first realized that your "callouts" were done by data analysts, many of whom manifest a characteristic disregard for natural language.  I think this feeling is reinforced by philosophers who often express their consternation with the weaknesses of human language.  (Mathematicians have largely abandoned the use of natural language.)  I have worked with computer programmers for years and should have known better.  In any case I myself have long harbored a distain for the grammar of computerese and the argot of texters, brought on by software developers often with narrowly developed skills.  The latest (1999) dictionary in my library does not even include this meaning of "callout."

 

The process of assuming a role has probably been separated out and was probably made part of the callout for clarity in what was more accurately called out as a simple request for a role.  If other requests were present along the same chain, it might make sense to summarize the anticipated process of assuming the role requested.  The processes might suggest to the programmer that the developer should confirm his request for a role before the role is assigned.  There is probably a "confirming" by the developer and then an "assigning" by the software.  The result is that the "developer assumes role requested." 

 

Bruce