syntax_data: {"ast_node_type":"other","tokens":[{"end":96,"kind":"keyword","start":0,"text":"///"}]}
source_snippet:     /// subcandidate. Any candidate that has been expanded this way should also be postprocessed
context_before:     /// Given a match-pair that corresponds to an or-pattern, expand each subpattern into a new
context_after:     /// at the end of [`Self::expand_and_match_or_candidates`].