Defines a protocol StringRepresentable that inherits from CustomStringConvertible, and provides a default implementation of description using reflection. It generates a string listing all the property names and values of any conforming type.

CustomStringConvertible

public protocol StringRepresentable: CustomStringConvertible { }

extension StringRepresentable {
    public var description: String {
        Mirror(reflecting: self).children.reduce("") { $0 + ($1.label ?? "").appending(":\($1.value as Any)\n") }
    }
}