    # File lib/fog/rackspace/requests/dns/list_subdomains.rb, line 5
            def list_subdomains(domain_id, options={})

              validate_path_fragment :domain_id, domain_id

              path = "domains/#{domain_id}/subdomains"
              if !options.empty?
                path = path + '?' + array_to_query_string(options)
              end

              request(
                :expects  => 200,
                :method   => 'GET',
                :path     => path
              )
            end