mmwave - READING which of four separate distance ranges?

Hi!  I have a question about the mmwave radar products.

My project is to detect the level of fullness in a barrel of sawdust. I see that the Arduino library provides the ability for me to set up to four distance detected ranges. Is there a mechanism in the existing Arduino library to read -which- of the four ranges the object is in? (In my use case, four levels of fullness.) 

So far, in the API function list I only see the means to detect in one range. [ bool readPresenceDetection(void); ]

TIA for any advice. If any of your other products are better suited for my needs, I am entirely open to that possibility.