Entry-level isSingleDocRefKind: narrows a resolved entry to the single-GDR arms (doc.ref / subject) — the value is one GDR (or null) and the entry may carry the accepted-target types.
doc.ref
subject
types
Entry-level isSingleDocRefKind: narrows a resolved entry to the single-GDR arms (
doc.ref/subject) — the value is one GDR (or null) and the entry may carry the accepted-targettypes.