Yep, I know its functionality, but do you think we should add this method to engine?
If it's just used for *Armature*, why not just put the implementation in *Armature*?
PS: You have to also consider the different implementation on iOS which doesn't use NSDictionary rather than tinyXML.
PS2: Please refer to https://github.com/2youyouo2/cocos2d-x/blob/5e8f63e9e81b7d6295f7da7f4c861648adbd714a/extensions/CCArmature/utils/CCSpriteFrameCacheHelper.cpp#L71
Obviously, it's only used there. But it was commented. Right? So this method isn't used anywhere in *Armature*.