{"ast_node_type":"other","tokens":[{"end":99,"kind":"keyword","start":0,"text":"structurally_same_type_impl(seen_types,"}]}
                            structurally_same_type_impl(seen_types, tcx, typing_env, *a, *b, ckind)
                        && a_sig.inputs().iter().eq_by(b_sig.inputs().iter(), |a, b| {
                        })