{"ast_node_type":"other","tokens":[{"end":57,"kind":"keyword","start":0,"text":"Some(ty::ImplTraitInTraitData::Trait"}]}
        Some(ty::ImplTraitInTraitData::Trait { .. }) => {
        // a projection self type.
            explicit_item_bounds_with_filter(tcx, def_id, PredicateFilter::ConstIfConst)