syntax_data: {"ast_node_type":"other","tokens":[{"end":31,"kind":"keyword","start":0,"text":"collector.visit_body(body);"}]}
source_snippet:     collector.visit_body(body);
context_before:     let mut collector = Collector { result: DenseBitSet::new_empty(body.local_decls.len()) };
context_after:     collector.result