{"ast_node_type":"other","tokens":[{"end":49,"kind":"keyword","start":0,"text":"PolySigs(ExpectedFound<ty::PolyFnSig<'tcx>>),"}]}
    PolySigs(ExpectedFound<ty::PolyFnSig<'tcx>>),
    TraitRefs(ExpectedFound<ty::TraitRef<'tcx>>),
    ExistentialTraitRef(ExpectedFound<ty::PolyExistentialTraitRef<'tcx>>),