/*@ public behavior
 @ requires template != null;
 @ ensures (g_o instanceof FormalInstancePacket) ==>
 @ 		\result == g_packet &&
 @ 		g_packet instanceof FormalInstancePacket;
 @ signals (CloneNotSupportedException cse) true;
 @*/
 private FormalInstancePacket makeClone() throws CloneNotSupportedException {
   FormalInstancePacket packet = null;
   // @ set g_packet = null;
   Object o = template.clone();
   // @ set g_o = o;
   if (o instanceof FormalInstancePacket) {
     packet = (FormalInstancePacket) o;
     // @ set g_packet = packet;
   }
   return packet;
 }