{"ast_node_type":"variable","tokens":[{"end":58,"kind":"keyword","start":0,"text":"let"}]}
                                let derive_helper_compat =
                                    Res::NonMacroAttr(NonMacroAttrKind::DeriveHelper);
                                    Res::NonMacroAttr(NonMacroAttrKind::DeriveHelperCompat);