     <div>
                    <code>
                    <a name="/s:FC9FutureKit27NSObjectLockSynchronization13lockAndModifyFS0_FFT_T_T_"></a>
                    <a name="//apple_ref/swift/Method/lockAndModify(_:)" class="dashAnchor"></a>
                    <a class="token" href="#/s:FC9FutureKit27NSObjectLockSynchronization13lockAndModifyFS0_FFT_T_T_">lockAndModify(_:)</a>
                    </code>
                  </div>
                  <div class="height-container">
                    <div clas