config.json

{
  "source": ["tokens/**/*.json"],
  "platforms": {
    "flutter": {
      "transformGroup": "flutter",
      "buildPath": "../lib/unique_file/",
      "files": [
        {
          "destination": "style_dictionary.dart",
          "format": "flutter/class.dart",
          "options": {
            "className": "StyleDictionary"
          }
        }
      ]
    },
    "flutter-separate": {
      "transformGroup": "flutter-separate",
      "buildPath": "../lib/",
      "files": [
        {
          "destination": "style_dictionary_color.dart",
          "format": "flutter/class.dart",
          "options": {
            "className": "StyleDictionaryColor",
            "type": "color"
          },
          "filter": {
            "type": "color"
          }
        },
        {
          "destination": "style_dictionary_sizes.dart",
          "format": "flutter/class.dart",
          "options": {
            "className": "StyleDictionarySize",
            "type": "float"
          },
          "filter": {
            "type": "color"
          }
        }
      ]
    }
  }
}