of
The term for one element, or null when it has no complete tuple.
null for an element missing any declared field, for one whose field holds a container or a JSON null — neither has a signature — and for a tuple above IndexOptions.maxTermBytes. All three mean the same thing to a caller: this element is not keyed, so the index cannot be asked about it, and the document is found by the scan that covers what the index does not.
Parameters
values
one entry per declared field, in declaration order, null where the element had no value there. Built by the caller's own TermExtractor over the relative paths, so that the writer and the recheck agree by construction rather than by inspection.