    # File lib/fog/ibm/requests/storage/delete_volume.rb, line 27
            def delete_volume(volume_id)
              response = Excon::Response.new
              if volume_exists? volume_id
                self.data[:volumes].delete volume_id
                response.status = 200
                response.body = {"success"=>true}
              else
                response.status = 404
              end
              response
            end