if (!options.has("stdio", options)) {
throw new EvaluatorException("Missing stdio in options");
}
Scriptable stdio = (Scriptable)options.get("stdio", options);
Sandbox scriptSandbox = new Sandbox(parent.runner.getSandbox());
try {
createReadableStream(cx, stdio, 0, scriptSandbox);
createWritableStream(cx, stdio, 1, scriptSandbox);
createWritableStream(cx, stdio, 2, scriptSandbox);