class GDPerfClock
{
  virtual TClock operator=( TClock tcNewBase );
};

class GDCountDown : public GDPerfClock
{
  virtual TClock operator=( TClock tcNewBase );
};

TClock GDCountDown::operator=( TClock tcNewBase )
{
    <watch this space>
}

$BaseClassName$::$MethodName$( $MethodArgs$ );

    GDPerfClock::=( tcNewBase );