   </tr>
      
      <tr>
        <td><code>kwArgs</code></td>
        <td><p>The keyword arguments to the method.  None by default.</p></td>
      </tr>
      
      <tr>
        <td><code>blockRetention</code></td>
        <td><p>Should the <code>blockCall</code> closure be retained for
longer than this call?  See <a href="../types/rbblockretention.html?swift"><code>RbBlockRetention</code></a>.</p></td>
      </tr>
      
      <tr>
        <td><code>blockCall</code></td>
        <td><p>Swift code to pas