ValidatedNelValidationErrorActivity.kt

fun handleInvalid(errors: Nel<ValidationError>) {
        errors.map { handleInvalidField(it) }.all.forEach { it.second.error = it.first }
    }

fun handleInvalidField(validationError: ValidationError): Pair<String, TextInputLayout> =
    when (validationError) {
        ValidationError.InvalidMail -> Pair(getString(R.string.invalid_mail), emailWrapper)
        ValidationError.InvalidPhoneNumber -> Pair(getString(R.string.invalid_phone_number), numberWrapper)
    }