syntax_data: {"ast_node_type":"other","tokens":[{"end":89,"kind":"keyword","start":0,"text":"///"}]}
source_snippet:     ///   converted into subcandidates (see [`Builder::expand_and_match_or_candidates`]).
context_before:     /// - During or-pattern expansion, any leading or-pattern is removed, and is
context_after:     /// - After a candidate's subcandidates have been lowered, a copy of any remaining