In Wikidata an important data type is to connect to another qid.
The documentation currently only describes setting strings.
It could have a basic example how to declare an item as the value of a statement.
Git Repo: https://github.com/addwiki/wikibase-api
Documentation directory: https://github.com/addwiki/wikibase-api/tree/master/docs
Example patch in another repo which adds functionality but also updated the docs: https://github.com/addwiki/mediawiki-api-base/commit/2eb635079cc69e0b84ea1d51a5052358845bee01#diff-e3e2a9bfd88566b05001b02a3f51d286
The files changed in the above commit that update the docs are docs/index.rst and the addition of docs/multipart.rst