{"ast_node_type":"other","tokens":[{"end":100,"kind":"keyword","start":0,"text":"self.lower_fn_ty(hir_ty.hir_id,"}]}
                    self.lower_fn_ty(hir_ty.hir_id, bf.safety, bf.abi, bf.decl, None, Some(hir_ty)),
                    tcx,
                )