# File lib/deltacloud/drivers/ec2/ec2_driver.rb, line 332
        def lb_unregister_instance(credentials, opts={})
          ec2 = new_client( credentials, :elb)
          safely do
            ec2.deregister_instances_from_load_balancer(opts['id'], [opts['instance_id']])
            load_balancer(credentials, :id => opts['id'])
          end
        end