@Formula scriptlibrary that I can re-use across my design elements

If I have an @Formula function that I want to reuse across my design elements (e.g. Postopen event for all views and database script) I have to rewrite the function for every design element. It would be much handier if I could store the code as a function in a @Formula script library which I share across my application and just call the function

e.g.:

@If(

@IsMember("[admin]";@UserRoles);@Return(@Command()[OpenNavigator],"dbadmin-open"));

"")

becomes:

function commonPostOpenEvent (){

@If(@IsMember("[admin]";@UserRoles);@Return(@Command()[OpenNavigator],"dbadmin-open"));"")

}

and this function I call from the view Postopen event