def packer_amis(self):
        for artifact in self.artifacts:
            if artifact['type'] == 'amazon-ebs':
                return _unserialize_packer_dict(artifact["id"])
        return freeze({})
:return: A ``dict`` of ``{aws_region: ami_id}`` found in the
dataset/ETHPy150Open ClusterHQ/flocker/admin/installer/_images.py/_PackerOutputParser.packer_amis