syntax_data: {"ast_node_type":"other","tokens":[{"end":62,"kind":"keyword","start":0,"text":"candidate.match_pairs.extend(match_pair.subpairs);"}]}
source_snippet:             candidate.match_pairs.extend(match_pair.subpairs);
context_before:             let match_pair = candidate.match_pairs.remove(match_pair_index);
context_after:             // Move or-patterns to the end.