extension String {
    func camelCaseToSnakeCase() -> String {
        var result = ""
        var lastCharacterWasUppercase = false

        for character in self {
            if character.isUppercase {
                if !result.isEmpty && !lastCharacterWasUppercase {
                    result.append("_")
                }
                result.append(character.lowercased())
                lastCharacterWasUppercase = true
            } else {
                result.append(character)
                lastCharacterWasUppercase = false
            }
        }

        return result
    }
}