       </div>
            <p>A chain key for the ratchet.</p>

          </section>
          <section class="section task-group-section">
            <div class="task-group">
              <ul>
                <li class="item">
                  <div>
                    <code>
                    <a name="/s:19SignalProtocolSwift15RatchetChainKeyV07messageF4Seed33_DF9A6BC8AA754524E44B951DFDB0A492LL10Foundation4DataVvZ"></a>
                    <a name="//apple_ref/swift/Variable/messageKeySeed" class="das