</code> or <code>false</code>:

<ul>
<li>If your return <code>true</code>, then the request will resume, subject to the satisfaction of other constraints.</li>
<li>In you return <code>false</code>, Swifty will asynchronously call your <code>satisfyConstraint</code> method, and here you can perform any operation as required. Just make sure you call <code>finish</code> when done, so that Swifty can resume the requests that were waiting on your constraint.

<ul>
<li>You can even finish with an <code>error</cod