# File lib/fog/volume/openstack/requests/update_volume_type.rb, line 5
        def update_volume_type(volume_type_id, options = {})
          data = {
            'volume_type' => {}
          }

          vanilla_options = [:name, :extra_specs]
          vanilla_options.select { |o| options[o] }.each do |key|
            data['volume_type'][key] = options[key]
          end
          request(
            :body    => Fog::JSON.encode(data),
            :expects => [200, 202],
            :method  => 'PUT',
            :path    => "types/#{volume_type_id}"
          )
        end