de> are true, then <code>o1 == o3</code> must be true.</p></li></ul>
<p>The method should also be consistent over time,
so whether two objects are equal should only change
if at least one of the objects was modified.</p>
<p>If a subclass overrides the equality operator it should override
the <a href="dart-ui/TextDecoration/hashCode.html">hashCode</a> method as well to maintain consistency.</p>
    </section>
    
    <section class="summary source-code" id="source">
      <h2><span>Implementation</span> </h