Because of the revamp in the Serializer docs (see#17783) we are pausing all changes and merges to any docs related to Serializer.

Please, don't contribute anything related to Serializer until we finish that revamp. Thanks for understanding!

Pinging the most active contributors (@alexandre-daubois,@alamirault,@94noni) and mergers (@weaverryan,@OskarStark,@xabbuh) so everybody is warned about this. Thanks!