ource will start waiting for this Constraint, and Swifty will asynchronously call your <code>satisfyConstraint</code> method.</li>
</ul>

<blockquote>
<p>This method is called synchronously on a background thread.</p>

<p>This method is thread-safe, so you don&rsquo;t need to worry about multiple threads calling this method at the same time. Swifty internally locks access to this method to one resource at a time.</p>
</blockquote>

                      </div>
                      <div class="declaration">