if (_printRImpl == null) { return false;
try { if (_printRImpl == null) { return false;  }  _printRImpl.invoke(obj, env, out, depth, valueSet); return true; } catch (Exception e) { throw new QuercusException(e);
  protected boolean printRImpl(Env env,                               Object obj,                               WriteStream out,                               int depth,                               IdentityHashMap<Value, String> valueSet)    throws IOException, Throwable  {    if (_printRImpl == null) {      return false;    }    _printRImpl.invoke(obj, env, out, depth, valueSet);    return true;  }