With reference to this question (answer by @Michael Heemskerk) :
https://community.atlassian.com/t5/Answers-Developer-Questions/Is-it-possible-to-extend-stash-markdown-with-configurable-links/qaq-p/572875
Is the package com.atlassian.markup api still available in Bitbucket 6.7.0. If not, what has replaced it?