{
  "flag_defs": [
    {
        "flag": "custom_value"
      , "base_value": 0
    }
  ],

  "variants": [
    {
      "id": "CustomTest"
      , "conditions": [
        {
          "type": "CUSTOM"
          , "value": "secret"
        }
      ]
      , "mods": [
        {
          "flag": "custom_value"
          , "value": 42
        }
      ]
    }
  ]
}