Validators can call the object validator Z101 for a base validation, and then add more validation on top of it (e.g. use the default validator to make sure all keys are there and have the right type, and then use a bespoke checker to make sure that a specific key's value follows additional rules)
|Resolved||None||T290119 Phase η root task|
|Resolved||None||T290118 User-defined types work with validation|
|Resolved||Jdforrester-WMF||T291031 Validator implementations can call Z101/object validator, and then add to it|
This is implicitly done because the orchestrator validates inputs as Z1s regardless of their disposition.