// TODO: inner classes will not be found (need to replace . with $)
static InputStream inputStreamForClass(Class c) ctex {
  if (c == null) null;
  
  ClassLoader cl = getClassLoader(c);
  
  if (cl cast InMemoryClassLoader) {
    byte[] bytes = cl.getClassBytes(c);
    if (bytes != null)
      ret byteArrayInputStream(bytes);
  }
  
  // handle JavaXClassLoader
  Cl<File> files = cast getOpt(cl, 'files);
  if (files != null) {
    S name = c.getName().replace('.', '/') + ".class";
    for (File location : files) 
      try object InputStream in = inputStreamForFileInDirOrZip(location, name);
    fail(name + " not found in: " + files);
  }
  
  ifdef Jython
  // for patched Jython class loader
  if (classNameIs(cl, "org.python.core.BytecodeLoader$Loader")) {
    Map<S, byte[]> rawData = cast getOpt(cl, "rawData");
    ret byteArrayInputStreamOrNull(mapGet(rawData, c.getName()));
  }
  endifdef
  
  ret null;
}

Began life as a copy of #1012229