def __init__(self, ec2_client, cluster_id):
        self.connection = ec2_client.connection
        self.zone = ec2_client.zone
        self.cluster_id = cluster_id
        self.lock = threading.Lock()
Takes product of elements in sequence.
dataset/ETHPy150Open ClusterHQ/flocker/flocker/node/agents/ebs.py/EBSBlockDeviceAPI.__init__--crossover with--dataset/ETHPy150Open EntilZha/PyFunctional/functional/pipeline.py/Sequence.product