# File lib/fog/aws/elb.rb, line 74
        def initialize(options={})
          @aws_access_key_id = options[:aws_access_key_id]

          @region = options[:region] || 'us-east-1'

          unless ['ap-northeast-1', 'ap-southeast-1', 'eu-west-1', 'us-east-1', 'us-west-1', 'us-west-2'].include?(@region)
            raise ArgumentError, "Unknown region: #{@region.inspect}"
          end
        end