   <div class="features">final</div>
        </section>
        <section class="desc markdown">
          <p>The index of the first character in the range.</p>
<p>If <a href="dart-ui/TextRange/start.html">start</a> and <a href="dart-ui/TextRange/end.html">end</a> are both -1, the text range is empty.</p>
        </section>
                <section class="summary source-code" id="source">
          <h2><span>Implementation</span></h2>
          <pre class="language-dart"><code class="language-dart">final int