syntax_data: {"ast_node_type":"other","tokens":[{"end":60,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:                 // Expand the or-pattern into subcandidates.
context_before:                 let or_match_pair = candidate.match_pairs.remove(0);
context_after:                 self.create_or_subcandidates(candidate, or_match_pair);