syntax_data: {"ast_node_type":"variable","tokens":[{"end":61,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:         let term = cfg.block_data_mut(from).terminator_mut();
context_before:         // (The dummy is added by `break_scope` and `break_for_else`.)
context_after:         if let TerminatorKind::UnwindResume = term.kind {