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2. If there is no friends then sidebar.js calls its member function updateFriends which calls this._fbs.updateFriends.
3. nsFaceBookService.updateFriends is similar to the createAuthToken where it uses this._client to make an AJAX request in order
to get a data from the corresponding service information session, such as the case of friends. Information retrieved by the social service is retrieved as a json format to be parsed.
4. onUpdateFriends is the even function used to populate new friends.
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