static Class hotwireCoreSpecialMainClass(S mainClassName, L<File> files) ctex {
  // make class loader
  JavaXClassLoader classLoader = hotwire_makeClassLoader(files);

  // load & return main class
  Class<?> theClass = classLoader.loadClass(mainClassName);
  
  setOpt(theClass, "__javax", getJavaX());
  if (getOpt(theClass, "programID") == null)
    setOpt(theClass, "programID", "#3999999");
  
  if (!_inCore())
    hotwire_copyOver(theClass);
  
  ret theClass;
}

Began life as a copy of #1003841