Write to file in MuseScore3 plugin

Hi,
I am trying to write a plugin that can extract information about the score and write it to a csv file (to create tokens for an OMR project). I attached a small plugin that should log some elements in a csv for testing but it seems that the necessary class QFile for that is missing. I use MuseScore 3.6.2, is this class not exposed to plugins anymore (I thought it used to be in earlier versions)? If so are there any other options to extract information? In the end I want to call MuseScore via command line for an entire corpus and retrieve information (I also need position information like bounding boxes, so extracting from musicxml is no option)