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    <h1>operator == method</h1>

    <section class="multi-line-signature">
      <span class="returntype">bool</span>
      <span class="name ">operator ==</span>
(<wbr><span class="parameter" id="==-param-other"><span class="type-annotation">dynamic</span> <span class="parameter-name">other</span></span>)
      <div class="features">inherited</div>
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    <section class="desc markdown">
      <p>The equality operator.</p>
<p>The default behavior for all <code>Object</code>s is to return true if and
only if <code>this</code> and <code>other</code> are the same object.</p>
<p>Override this method to specify a different equality relation on
a class. The overriding method must still be an equivalence relation.
That is, it must be:</p><ul><li>
<p>Total: It must return a boolean for all arguments. It should never throw
or return <code>null</code>.</p></li><li>
<p>Reflexive: For all objects <code>o</code>, <code>o == o</code> must be true.</p></li><li>
<p>Symmetric: For all objects <code>o1</code> and <code>o2</code>, <code>o1 == o2</code> and <code>o2 == o1</code> must
either both be true, or both be false.</p></li><li>
<p>Transitive: For all objects <code>o1</code>, <code>o2</code>, and <code>o3</code>, if <code>o1 == o2</code> and
<code>o2 == o3</code> 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 <code>hashCode</code> method as well to maintain consistency.</p>
    </section>
    
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      <h2><span>Implementation</span> </h2>
      <pre class="language-dart"><code class="language-dart">external bool operator ==(other);</code></pre>
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