static void liveWire(S extensionCode) ctex {
  S src = transpileRaw(extensionCode); // transpiled, with lib references
  src = findTranslators2(src, new L);
  
  File jar = CompilerBot.compile(src);
  assertTrue(jar.getAbsolutePath(), jar.isFile());
  
  // load it!
  call(myClassLoader(), "addURL", jar.toURI().toURL());
}