Examine source code of Gimp lava effect

{
  "theme": {
    "images": {
      "theme_frame": "headhead.jpeg"
    },
    "colors": {
      "frame": "#fc4646",
      "tab_background_text": "#f25430"
    }
  },
  "version": "2.0",
  "name": "Gimp lava effect",
  "manifest_version": 2,
  "description": "Edited in gimp with lava effect, 12 density."
}