# File lib/fog/cloudstack/requests/compute/list_volumes.rb, line 20
        def list_volumes(options={})
          volume_id = options.delete('id')
          if volume_id
            volumes = [self.data[:volumes][volume_id]]
          else
            volumes = self.data[:volumes].values
          end

          {
            'listvolumesresponse' => {
              'count' => volumes.size,
              'volume' => volumes
            }
          }
        end