er">On this page</div>
    <hr>
    <ul>
        <li>
          <a href="#toc_defining-classes">Defining Classes</a>
        </li>
        <li>
          <a href="#toc_overriding-parent-class-methods">Overriding Parent Class Methods</a>
        </li>
        <li>
          <a href="#toc_creating-instances">Creating Instances</a>
        </li>
        <li>
          <a href="#toc_initializing-instances">Initializing Instances</a>
        </li>
        <li>
          <a href="#toc_accessing-object-properties"