data:extend(
{
  {
    type = "item-group",
    name = "helmod",
    order = "zzzz",
    icon = "__helmod__/graphics/icons/helmod-group.png",
    icon_size = 64
  },
  {
    type = "item-subgroup",
    name = "helmod-resource",
    group = "helmod",
    order = "aaaa"
  },
  {
    type = "item-subgroup",
    name = "helmod-fluid",
    group = "helmod",
    order = "bbbb"
  },
  {
    type = "item-subgroup",
    name = "helmod-boiler",
    group = "helmod",
    order = "cccc"
  },
  {
    type = "item-subgroup",
    name = "helmod-energy",
    group = "helmod",
    order = "dddd"
  },
  {
    type = "item-subgroup",
    name = "helmod-rocket",
    group = "helmod",
    order = "eeee"
  },
  {
    type = "item-subgroup",
    name = "helmod-recipe-burnt",
    group = "helmod",
    order = "ffff"
  }
})
