{"ast_node_type":"other","tokens":[{"end":64,"kind":"keyword","start":0,"text":"hir::FnRetTy::DefaultReturn(sp)"}]}
                    hir::FnRetTy::DefaultReturn(sp) => Some(sp),
                let infer_in_rt_sp = match fn_decl.output {
                    hir::FnRetTy::Return(ty) => span_of_infer(ty),