{
  "type": "object",
  "description": "A reference to a function associated with an action",
  "properties": {
    "functionType": {
      "type": "string",
      "description": "The type of function",
      "example": "PRE_ACTION_EXECUTION",
      "enum": [
        "PRE_ACTION_EXECUTION",
        "PRE_FETCH_OPTIONS",
        "POST_FETCH_OPTIONS",
        "POST_ACTION_EXECUTION"
      ]
    },
    "id": {
      "type": "string",
      "description": "The unique identifier of the function",
      "example": "500123"
    }
  },
  "required": [
    "functionType",
    "id"
  ],
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "title": "ActionFunctionReference"
}