for future use, then the Swift closure must be both escaping and sendable
and you must call the method with <a href="../types/rbobjectaccess1.html?swift#call_argskwargsblockretentionblockcall1"><code>call(_:args:kwArgs:blockRetention:blockCall:)</code></a>.</p>
<p>For a version that does not throw, see <a href="../types/rbobjectaccess1.html?swift#failable"><code>failable</code></a>.</p>



            </div>
            <h5>Declaration</h5>
            <div class="j2-item-declaration">
              
  <div