pression usage</h4>

<p><strong>Note:</strong> This function is exposed to the Mockingbird environment with a
name that differs from that of its implementing method:</p>

<pre><code>^respondsToSelector($myName|isEqualToString:)
</code></pre>

<p>The expression above would evaluate to true if the expression <code>$myName</code>
yields an <code>NSString</code> instance (or an instance of any other class that
responds to the <code>isEqualToString:</code> message).</p>
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