Missing documentation in Validations

[nemani]

Neither https://github.com/balderdashy/waterline-docs/blob/master/models/validations.md
nor https://github.com/balderdashy/sails-docs/blob/master/concepts/ORM/Attributes.md
give any examples or mention if we can use nested data types or not.
In addition nowhere on Stack Overflow, is this question answered.

BUT, the readme for anchor states that

but goes a step further by adding support for array and object sub-validation

Is it supported or not?
Please fix this mistake.
Thanks :)