# File lib/fog/ibm/models/storage/volume.rb, line 83
        def save
          raise Fog::Errors::Error.new('Resaving an existing object may create a duplicate') if persisted?
          requires :name, :offering_id, :format, :location_id, :size
          data = service.create_volume(name, offering_id, format, location_id, size)
          merge_attributes(data.body)
          true
        end