data:extend({
  {
    type = "item-subgroup",
    name = "bob-energy-boiler",
    group = "production",
    order = "b-a1",
  },
  {
    type = "item-subgroup",
    name = "bob-energy-boiler-convert",
    group = "production",
    order = "b-a2",
  },
  {
    type = "item-subgroup",
    name = "bob-energy-oil-boiler",
    group = "production",
    order = "b-a3",
  },
  {
    type = "item-subgroup",
    name = "bob-energy-oil-boiler-convert",
    group = "production",
    order = "b-a4",
  },
  {
    type = "item-subgroup",
    name = "bob-energy-heat-exchanger",
    group = "production",
    order = "b-a5",
  },
  {
    type = "item-subgroup",
    name = "bob-energy-heat-exchanger-convert",
    group = "production",
    order = "b-a6",
  },

  {
    type = "item-subgroup",
    name = "bob-energy-steam-engine",
    group = "production",
    order = "b-b1",
  },
  {
    type = "item-subgroup",
    name = "bob-energy-fluid-generator",
    group = "production",
    order = "b-b2",
  },
  {
    type = "item-subgroup",
    name = "bob-energy-solar-panel",
    group = "production",
    order = "b-c",
  },
  {
    type = "item-subgroup",
    name = "bob-energy-accumulator",
    group = "production",
    order = "b-d",
  },
})
