The name of the index hosting the referenced document.
The name is returned as it is configured in Hibernate Search,
i.e. it is not normalized (lowercased, ...) as some backends may do under the hood.
The identifier of the referenced document.
The identifier is returned as it was generated during document building,
i.e. it does not take into account backend-specific transformations
such as appending a tenant ID when using multi-tenancy.