Method getLastBox

Exercises/NoModules/Chapter 12/Soln12_08/Truckload.cpp:87–92

}

SharedBox Truckload::Iterator::getLastBox()
{
  // Return m_tail's box (or nullptr if the list is empty)
  m_current = m_tail;
  return getCurrentBox();
}

SharedBox Truckload::Iterator::getNextBox()
{