plement a
type (or multiple types) that are not known at compile time. If the types
are known at compile time, a class can be written that implements these
types.</p>
      </section>
            <section class="summary source-code" id="source">
        <h2><span>Implementation</span></h2>
        <pre class="language-dart"><code class="language-dart">const Object proxy = _Proxy()</code></pre>
      </section>

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