-type. It does not provide commands to set these fields, as they are
-set in the sending call path (see Section 2.3). The <tt class="docutils literal"><span class="pre">setDestination</span></tt>
-and <tt class="docutils literal"><span class="pre">setType</span></tt> commands fulfill a similar purpose to
-<tt class="docutils literal"><span class="pre">Packet.setLength</span></tt>.</p>
+type. It also provides commands to set these fields, for the same
+reason that Packet allows a caller to set the payload length.</p>