Get useVolumetric field value from HDAdditionalLightData by script.

Hi,
i need to get information from light if it uses volumetrics. It is just a checkbox in light component
200229-volumetrics1.png

It is stored in HDAdditionalLightData:

But i cannot find any way to get it. I also tried Reflections but couldn’t get it.
Does anyone of you know how to determine if it is true or false? Maybe some indirect way?

Thanks in advance.
Cheers

Still nothing. Didn’t find a way