syntax_data: {"ast_node_type":"variable","tokens":[{"end":56,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:         let ssa = SsaLocals::new(tcx, body, typing_env);
context_before:         let typing_env = body.typing_env(tcx);
context_after:         debug!(borrowed_locals = ?ssa.borrowed_locals());