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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def get_object(self, item):
 """ Returns a StorageObject matching the specified item. If no such object exists, a NotFound exception is raised. If 'item' is not a string, that item is returned unchanged. """

        if isinstance(item, six.string_types):
            item = self.object_manager.get(item)
        return item