# File lib/fog/volume/openstack/v2/models/volume.rb, line 15
          def save
            requires :name, :size
            data = if id.nil?
                     service.create_volume(name, description, size, attributes)
                   else
                     service.update_volume(id, attributes.reject { |k, _v| k == :id })
                   end
            merge_attributes(data.body['volume'])
            true
          end