Does Validation-and-Serialization document's outdated?

[Matteo Collina]

Discussed in #5457

^{Originally posted by whtjs May 9, 2024}
there's an paragraph

Validation will only be attempted if the content type is application-json, as described in the documentation for the content type parser.

but when i move to content type parser. and tried to find about validation or serialization. Can't find about it