code: public static SkeletonPacket create(OggPacket packet) {
         // Special header types detection
         if(isSkeletonSpecial(packet)) {
             byte type = packet.getData()[3];
             switch(type) {
             case (byte)'h': // fishead
                 return new SkeletonFishead(packet);
             case (byte)'b': // fisbone
                 return new SkeletonFisbone(packet);
             }
         }
  
         // Only Skeleton 4+ has key frames
         // Skeleton 3 just has the two fis* packets
         return new SkeletonKeyFramePacket(packet);
     }
docs: Creates the appropriate {@link SkeletonPacket}
  instance based on the type.