369   uint32_t GetAckSize (void) const;

   369   uint32_t GetAckSize (void) const;

   370   uint32_t GetRtsSize (void) const;

   370   uint32_t GetRtsSize (void) const;

   371   uint32_t GetCtsSize (void) const;

   371   uint32_t GetCtsSize (void) const;

   372   uint32_t GetSize (Ptr<const Packet> packet, const WifiMacHeader *hdr) const;

   372   uint32_t GetSize (Ptr<const Packet> packet, const WifiMacHeader *hdr) const;

   373   Time NowUs (void) const;

   373   Time NowUs (void) const;

   375   void ForwardDown (Ptr<const Packet> packet, const WifiMacHeader *hdr, 

   374   void ForwardDown (Ptr<const Packet> packet, const WifiMacHeader *hdr, 

   376                     WifiMode txMode);

   375                     WifiMode txMode);

   377   Time CalculateOverallTxTime (Ptr<const Packet> packet,

   376   Time CalculateOverallTxTime (Ptr<const Packet> packet,

   378                                const WifiMacHeader* hdr, 

   377                                const WifiMacHeader* hdr, 

   379                                const MacLowTransmissionParameters &params) const;

   378                                const MacLowTransmissionParameters &params) const;