All around NAV dev and test
It is considered a general coding best practice to declare a function as being local. Over time you could see that the NAV Team was also adhering this, even though C/SIDE wasn't helping a lot on this as new functions would by default be global, i.e. the property Local would be <No> (or you might say undefined). Now with NAV 2015 any new function will get Local=Yes.
Well, that's not always true I found out today by accident when writing my previous post. It appears to be depending on the Subtype of the codeunit.
If Subtype is ...