How to use ghc-heap-view of ghc-8.6

Dear devs, I'm interested in ghc-heap-view of ghc-8.6. [1] Is there a document on how to use the ghc-heap-view of ghc-8.6? [1]: https://ghc.haskell.org/trac/ghc/wiki/Status/GHC-8.6.1#Landedinmasterbranch Regards, Takenobu