Lists the stored properties (both public and private) of the given instance.

ListProperties.swift

func listProperties(of subject: Any, maxDepth: Int? = nil) {
  func listProperties(of subject: Any, maxDepth: Int?, indentationLevel: Int) {
    if let maxDepth, maxDepth == 0 {
      return
    } else {
      let mirror = Mirror(reflecting: subject)
      let indentation = String(repeating: "\t", count: indentationLevel)
      for case (let label, let value) in mirror.children {
        print("\(indentation)▶︎ \(label ?? "<unknown label>"): \(type(of: value)) = \(value)")
        
        listProperties(
          of: value,
          maxDepth: maxDepth.map { $0 - 1 },
          indentationLevel: indentationLevel + 1
        )
      }
    }
  }
  
  print("\(type(of: subject)):")
  listProperties(of: subject, maxDepth: maxDepth, indentationLevel: 0)
}