    # File lib/fog/aws/models/elb/load_balancer.rb, line 140
            def save
              requires :id
              requires :listeners
              # with the VPC release, the ELB can have either availability zones or subnets
              # if both are specified, the availability zones have preference
              #requires :availability_zones
              if (availability_zones || subnet_ids)
                service.create_load_balancer(availability_zones, id, listeners.map{|l| l.to_params}) if availability_zones
                service.create_load_balancer(nil, id, listeners.map{|l| l.to_params}, {:subnet_ids => subnet_ids, :security_groups => security_groups, :scheme => scheme}) if subnet_ids && !availability_zones
              else
                throw Fog::Errors::Error.new("No availability zones or subnet ids specified")
              end

              # reload instead of merge attributes b/c some attrs (like HealthCheck)
              # may be set, but only the DNS name is returned in the create_load_balance
              # API call
              reload
            end