   <section class="summary source-code" id="source">
      <h2>Source</h2>
      <pre><code class="prettyprint lang-dart">/**
 * Print out a String representation of this Node.
 */
String toString() {
  String value = nodeValue;  // Fetch DOM Node property once.
  return value == null ? super.toString() : value;
}</code></pre>
    </section>

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