Marc Lelijveld has taken advantage of external tools in Power BI:
Yes, really! I build and External Tool to document your Power BI Model. I know, documentation is not a very famous topic, but I believe a very important one! Lead time from data to insights is very short with Power BI, but often we forget to look back on what kind of monster we created. Especially if you want to share the dataset for reuse, I believe it is important to deliver some documentation as well. Maybe you even promote or certify this dataset in the future, which implicates that the model matches certain quality metrics and best practices.
Read the whole thing and check out Marc’s offering.