Comment on 'Metamorphic olivine after dehydration embrittlement in Serpentinite: Case study from the Shiraga Serpentinite mass in the Sanbagawa high P/T metamorphic belt, central Shikoku, Japan' by Fukumura, Okamoto and Terabayashi, https://doi.org/10.1111/iar.12293. (8th November 2019)