PS-121.322: (Javascript) Code outlining question Follow

Hello, again.

Here is the code:

var Class = (function(){

     var _PrivateClass = (function(){

          function _PrivateClass(){}

          _PrivateClass.prototype.someMethod = function(){};

          return _PrivateClass;
     }());

     var _privateVar;
     var _functionRef;
     var _functionRef2;

     function Class(){
          _functionRef = function(){};
          _functionRef2 = (function(){});
     }

     return Class;
}());

Why in the code structure window both 'classes' (Class (marked as v) and _PrivateClass (marked as C)) are displayed in global scope? Besides _PrivateClass also displayed in scope of Class (marked as v)! And why, when I comment out someMethod prototype, _PrivateClass disappears from global scope? Is there anything wrong with my code?

Same stranginess occurs with function assignment. In above example _functionRef jumps out into global scope after assignment in constructor, while _functionRef2 doesn't - why this happens?

Thanks in advance.

Regards.
Roman