# File lib/fog/compute/voxel/requests/devices_list.rb, line 5
        def devices_list(device_id = nil)
          options = {
            :parser     => Fog::Parsers::Compute::Voxel::DevicesList.new,
            :verbosity  => "normal"
          }

          unless device_id.nil?
            options[:device_id] = device_id
          end

          request("voxel.devices.list", options)
        end