; start the purchasePathRequest once you&rsquo;ve displayed your UI to your user.
[<a href="../Classes/Button.html">Button</a>.purchasePath fetchWithRequest:purchasePathRequest
                   purchasePathHandler:^(<a href="../Classes/BTNPurchasePath.html">BTNPurchasePath</a> <em>purchasePath, NSError </em>error) {
     if (purchasePath) {
         [purchasePath start];
     }
}];
@endcode</p>
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			<div class="method-subsection declared-in-section">
				<h4 class="method-subtit