Add type discriminator fields to types that participate in unions

[richardhauer]

What would you add to the SDK?

There are several places in the SitecoreData hierarchy that have collections of interfaces, such as Fields and Placeholders. These cannot be reliably serialised/deserialised without a type discriminator, at least not in .Net. That means the SitecoreData object cannot be remoted or persisted.

Adding a [JsonDerivedType] attribute to things like Component and JsonSerializedField would sort this right out.

Code of Conduct

• I agree to follow this project's Code of Conduct