ection class="summary source-code" id="source">
      <h2><span>Implementation</span></h2>
      <pre class="language-dart"><code class="language-dart">String join([String separator = &quot;&quot;]) {
  if (length == 0) return &quot;&quot;;
  StringBuffer buffer = new StringBuffer()..writeAll(this, separator);
  return buffer.toString();
}</code></pre>
    </section>

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