Rest Entity
Declares the REST DTO types of a DomainEntity: the response DTO of one entity (read) and of a page of entities (readAll), and the request DTO of its creation (create) and update (update).
None of them is used as a type: only their names are matched against the OpenAPI spec loaded for a codegen run. Each is optional; Unit falls back to the schema named by convention: playset, playset_list, create_playset and update_playset for Playset. Nothing declares there is no DTO to map in that direction: the endpoint's delegate then receives the request DTO as is. The annotation is repeatable, one per spec.
A response DTO is filled from the entity, a request DTO is read into the generated create or update command (see DomainCreate). Every property of either must be mapped, or the build fails.