While model addins are great idea, I seek for possibility to place some utility/library code into kind of <<Javascript>> class (as operations) and not into <<JavascriptAddin>> class itself.
That way a could develop some utility function set to be used in many model addins (shared code base).
The utility-class derived javascript object could be declared in model as addin class atrribute of specific type (i.e. utility class) and than accessed in the code with expression like: this.Utility1.FunctionA() .
PS. There is somehow related proposal to be able to re-use javascripts from Scripting view, in a model addins (
https://sparxsystems.com/forums/smf/index.php/topic,43908.0.html ,
https://sparxsystems.com/forums/smf/index.php/topic,43400.0.html ). However, for model-addin developers placing addins' re-usable code in a model element, is IMHO more natural and consistent.
