// parentMap: class name, ClassLoader, class name, ClassLoader, ...
static Class<?> hotwireWithParents(S progIDOrSrc, O... parentMap) ctex {
  // compile!
  
  S progID = isSnippetID(progIDOrSrc) ? progIDOrSrc : null;
  Pair<File, S> p = progID != null
    ? CompilerBot.compileSnippet2(progID)
    : pair(CompilerBot.compile(progIDOrSrc), progIDOrSrc);
  File jar = p.a;
  S javaSource = p.b;
  assertTrue(f2s(jar), jar.isFile());
  
  L<File> files = hotwire_collectJars(jar);
  
  // make class loader
  JavaXClassLoaderWithParents classLoader = new(progID, files);
  putAll(classLoader.parentMap, litorderedmap(parentMap));

  ret hotwire_finish(classLoader, progID, p.b);
}

Began life as a copy of #1011217