syntax_data: {"ast_node_type":"variable","tokens":[{"end":60,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:         let body_type = match tcx.hir_body_owner_kind(def) {
context_after:             rustc_hir::BodyOwnerKind::Fn | rustc_hir::BodyOwnerKind::Closure => {