allout-back-to-headingallout-back-to-heading is an alias for `allout-back-to-current-heading' in `
allout.el'. (allout-back-to-heading &optional INTERACTIVE) Move to heading line of current topic, or beginning if not in a topic. If interactive, we position at the end of the prefix. Return value of resulting point, unless we started outside of (before any) topics, in which case we return nil.