4-slot cRIO and default modules

[mikets]

I am very confused about the new module arrangements. Our team bought the new 4-slot cRIO this year. We followed the new convention and put the Analog module in slot 1, Digital module in slot 2 and the Solenoid module in slot 3. But we are trying to figure out if the WPILib would have the correct modules by default so we don't need to explicitly specify the modules when instantiating sensors and switches. This is to make sure our robotics library still works because the code would call GetDefaultXXXModule() to determine where the modules are. I have downloaded the source code of the WPILib. The more I look at it, the more confused I am. It looks like it is still defaulting to the 8-slot arrangement. For example, SensorBase.cpp has the modulePopulation array initialized to the 8-slot arrangement. SensorBase.h also has the following declaration:

UINT32 SensorBase::m_defaultAnalogModule = 1;
UINT32 SensorBase::m_defaultDigitalModule = 4;
UINT32 SensorBase::m_defaultSolenoidModule = 8;

But when reading threads here, I got an impression that I don't need to explicitly specify the module slot. And I have an impression that even the 8-slot cRIO should have the new module arrangement the same as the 4-slot. If so, why is the code showing the old arrangement?