syntax_data: {"ast_node_type":"variable","tokens":[{"end":71,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:         let must_be_overridden = match tcx.hir_node_by_def_id(def_id) {
context_before:     if tcx.features().intrinsics() && tcx.has_attr(def_id, sym::rustc_intrinsic) {
context_after:             hir::Node::Item(hir::Item { kind: hir::ItemKind::Fn { has_body, .. }, .. }) => {