{"ast_node_type":"other","tokens":[{"end":81,"kind":"keyword","start":0,"text":"PolyExistentialPredicate,"}]}
    PolyExistentialPredicate, PolyExistentialProjection, PolyExistentialTraitRef,
    HostEffectPredicate, NormalizesTo, OutlivesPredicate, PolyCoercePredicate,
    PolyProjectionPredicate, PolyRegionOutlivesPredicate, PolySubtypePredicate, PolyTraitPredicate,