    # File lib/fog/openstack/requests/network/update_subnet.rb, line 6
            def update_subnet(subnet_id, options = {})
              data = { 'subnet' => {} }

              vanilla_options = [:name, :gateway_ip, :dns_nameservers,
                                 :host_routes, :enable_dhcp]
              vanilla_options.select{ |o| options.has_key?(o) }.each do |key|
                data['subnet'][key] = options[key]
              end

              request(
                :body     => Fog::JSON.encode(data),
                :expects  => 200,
                :method   => 'PUT',
                :path     => "subnets/#{subnet_id}"
              )
            end