static Cl<S> stefansOS_snippetIDToModuleLibIDs(S _snippetID, Class c default hotwireModule(_snippetID)) {
  snippetID = fsI(_snippetID);
  L<S> names = (L) callOpt(c, 'myInnerClasses);
  if (names == null)
    names = nonNulls(map getClassDeclarationName(innerClassesOfMain(getServerTranspiledWithoutLibs(snippetID))));
    
  print(+names);
  // only show the usable ones
  try {
    print(mcName := mainClassNameForClassLoader(c.getClassLoader()));
    names = shortClassNames(nonAbstractClassesInRealmWithSuperclassShortNamed(c, "DynModule", names));
    print(+names);
  } catch print e {
    names = null;
  }
  
  ret map(names, name -> joinWithSlash(snippetID, name));
}

Began life as a copy of #1016593