{

"$schema": "http://json-schema.org/draft-07/schema",
"definitions": {
  "channel_id": {
    "type": "string"
  },
  "group_left": {
    "type": "object",
    "description": "learn more: https://api.slack.com/events/group_left",
    "properties": {
      "channel": {
        "$ref": "#/definitions/channel_id"
      },
      "type": {
        "const": "group_left"
      }
    },
    "example": {
      "channel": "G02ELGNBH",
      "type": "group_left"
    }
  }
}

}