Decoding JSON with endless nesting

.swift

import Foundation

let JSON = """
[{
        "sub_elements": [{
            "sub_elements": [{
                "id": "4315FAC2-0809-478C-BED8-54F28B0A9A57",
                "name": "Shape 1"
            }, {
                "id": "D2985D5B-B98A-4549-A4ED-3742583A2532",
                "name": "Image 1"
            }, {
                "sub_elements": [{
                    "id": "718F235A-E2FB-4A05-A2A9-198CFA6B135A",
                    "name": "Shape 2"
                }, {
                    "id": "0C232502-A0D6-4BC7-B4DD-178B0BFE8BB0",
                    "name": "Image 2"
                }],
                "id": "C67F6AE9-2EA5-4850-AA00-2A1DB8EB4167",
                "name": "Group 3"
            }],
            "id": "4412C2FA-47D3-4524-A054-F06AE843DA45",
            "name": "Group 2"
        }, {
            "id": "99BBAA31-0A9D-46F8-89C7-BD7EE444919E",
            "name": "Shape"
        }, {
            "id": "B5281F95-72A4-4973-9A70-18ABF1D3DD92",
            "name": "Image"
        }],
        "id": "6ECF5DA1-0558-436C-93E7-CCED4461866D",
        "name": "Group"
}]
"""

struct Object: Decodable {
    let subElements: [Object]?
    let id: String
    let name: String
    
    enum CodingKeys: String, CodingKey {
        case id, name
        case subElements = "sub_elements"
    }
}

let jsonData = JSON.data(using: .utf8)!

let objectWithEndlessNesting = try! JSONDecoder().decode([Object].self, from: jsonData)

func showElements(data: [Object], delimeter: String = "") {
    var newLevelDelimeter = delimeter
    newLevelDelimeter += "-- "
    for item in data {
        print("\(newLevelDelimeter) Item \(item.id) \(item.name)")
        if let subElements = item.subElements {
            showElements(data: subElements, delimeter: newLevelDelimeter)
        }
    }
}

showElements(data: objectWithEndlessNesting)