syntax_data: {"ast_node_type":"other","tokens":[{"end":63,"kind":"keyword","start":0,"text":"TransferFunction"}]}
source_snippet:     TransferFunction { trans: &mut borrowed }.visit_body(body);
context_before:     let mut borrowed = Borrowed(DenseBitSet::new_empty(body.local_decls.len()));
context_after:     borrowed.0