The usage is:

val language: LanguageCodeString =
        someNullableString?.let { LanguageCodeString(it) }
                ?: LanguageCodeString("")

// ...

processStuff(arg1, arg2, arg3, language, arg4)

// ...

private fun processStuff(
        context: Context,
        arg1: String? = "",
        arg2: String? = "",
        arg3: String? = "",
        language: LanguageCodeString = LanguageCodeString(""),
        arg4: String? = ""
) {
    // ...
    formatted.add(language.getDisplayName(context))
}

Sorry, my mistake! The class is generated, with a member variable (String), but it’s never instantiated. The usages are Strings. Only static methods on the class are called, incude constructor-impl, which threw me off

localObject1 = someNullableString.getLanguage();
String str3;
if (localObject1 != null)
{
  str3 = LanguageCodeString.constructor-impl((String)localObject1);
  if (str3 != null) {}
}
else
{
  str3 = LanguageCodeString.constructor-impl("");
}

I saw the constructor call, but didn’t notice

str3

is a String

and that it’s actually a static method just named

constructor-impl()

to do the null check