2><span>Implementation</span></h2>
      <pre class="language-dart"><code class="language-dart">&#47;&#47; We don&#39;t compare the runtimeType because of _DebugSize in the framework.
@override
bool operator ==(dynamic other) {
  return other is Size
      &amp;&amp; other._dx == _dx
      &amp;&amp; other._dy == _dy;
}</code></pre>
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