{"ast_node_type":"other","tokens":[{"end":47,"kind":"keyword","start":0,"text":"Some(Node::Item(hir::Item"}]}
                    Some(Node::Item(hir::Item {
                    // Unmet obligation coming from an `impl`.
                        kind: hir::ItemKind::Impl(hir::Impl { of_trait, self_ty, generics, .. }),