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