Feature/missing zod chains on refs

[WickyNilliams]

i've tried my hand at getting this just right, but everything always ends up slightly wrong. I can't quite work out where I need to tweak the code to get chains on the named refs, without breaking some other part of the output.

in the process of this, i have uncovered some existing snapshots which i think are incorrect and are related to this (see most recent commit)

just making a PR now as a point of disucssion. any advice on where might be best to handle this would be appreciated