The raws created by the new DC GH6 camera by Panasonic use a new raw rw2 format
it seems using
I created an issue on rawtherapee bug tracker, but if some people have here knowledge in this field, I am also putting the information. I assume the code can be ported from and between if found.
(The raw files were created by me, feel free to use these in any way, if you need a licence WTFPL)
One file created by a GH6 is here
sets of white frame according to rawtherapee nomenclature.