utate Callback Dictionary" class="dashAnchor"></a>
                <a href="#/Mutate%20Callback%20Dictionary">
                  <h3 class="section-name">Mutate Callback Dictionary</h3>
                </a>
              </div>
              <ul>
                <li class="item">
                  <div>
                    <code>
                    <a name="/s:21InputBarAccessoryView15KeyboardManagerC2on5event2doACXDAA0E5EventO_yAA0E12NotificationVcSgtF"></a>
                    <a name="//apple_ref/swift/