JavaScript dojo 1.9: what annotation does declare.safeMixin add?

I have been reading through the dojo 1.9 documentation about declare.safeMixin(), focusing on the difference between it and lang.mixin.

Here is the explanation I found...

safeMixin() is a function defined in dojo/declare. It has the same functionality as dojo/_base/lang::mixin(), but additionally it annotates all copied methods compatibly with dojo/declare. This decoration can affect how this.inherited() works in mixed-in methods.

I can follow the example but it doesn't really explain exactly what is added and where, can anyone give any further examples of what annotation is added to each copied method?

So to be clear, I'm not asking for an explanation of inheritance, I'm just asking specifically about the annotations added by using declare.safeMixin() instead of lang.mixin.

Answer:1

safeMixin adds the nom property to functions that are mixed in to the target. This property is set to the key from the source object that the function was assigned to. e.g. if you call declare.safeMixin(target, { foo: function() {} }), the nom property for that function is "foo". This is necessary for this.inherited(arguments) to automatically figure out that it should call the parent "foo". The alternative to using safeMixin would be to explicitly specify the name of the parent function: this.inherited('foo', arguments);.

Answer:2

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