def find(self, instance_id):
        """ find an instance
        
        Create a new instance and populate it with data stored if it exists.
        
        Args:
            instance_id (str): UUID of the instance
        
        Returns:
            AtlasServiceInstance.Instance: An instance
        """
        instance = AtlasServiceInstance.Instance(instance_id, self.backend)
        self.backend.storage.populate(instance)
        return instance