the class.</p>

<h4>Expression usage</h4>

<pre><code>^classExists(NSString)
</code></pre>

<p>The expression above would return <code>YES</code>, because the class
<code>NSString</code> is part of the iOS SDK.</p>
			</div>
			

			

			

			
			<div class="method-subsection declared-in-section">
				<h4 class="method-subtitle">Declared In</h4>
				<p><code class="declared-in-ref">MBMLRuntimeFunctions.h</code></p>
			</div>
			
			
		</div>
	</div>
</div><div class="section-method">
	<a name="//api/name/ge