argument.
</p>
<p>The <code>withUnsafePointer(to:_:)</code> function is useful for calling Objective-C
APIs that take in parameters by const pointer.</p>
<p>The pointer argument to <code>body</code> is valid only during the execution of
<code>withUnsafePointer(to:_:)</code>. Do not store or return the pointer for later
use.</p>
</div>