dev/defs/event.json

{
  "name": "Event",
  "key": {
    "int": 128,
    "string": "event"
  },
  "extends": "custom_property_group.json",
  "properties": {
    "trigger": {
      "type": "callback",
      "animates": true,
      "key": {
        "int": 395,
        "string": "trigger"
      }
    }
  }
}