{"ast_node_type":"variable","tokens":[{"end":41,"kind":"keyword","start":0,"text":"let"}]}
    let arena = DroplessArena::default();
pub(super) fn crate_variances(tcx: TyCtxt<'_>, (): ()) -> CrateVariancesMap<'_> {
    let terms_cx = terms::determine_parameters_to_be_inferred(tcx, &arena);