sclass DynTextArea extends DynModule {
  transient S text;
  transient JTextArea textArea;
  
  JComponent visualize() {
    ret textArea = typeWriterTextArea(text);
  }
  
  void setText(S text) {
    temp enter();
    if (neq(this.text, text)) {
      this.text = text;
      setText(textArea, text);
    }
  }
}