Trait rustc_middle::ty::predicate::ToPolyTraitRef

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pub trait ToPolyTraitRef<'tcx> {
    // Required method
    fn to_poly_trait_ref(&self) -> PolyTraitRef<'tcx>;
}

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impl<'tcx> ToPolyTraitRef<'tcx> for PolyTraitPredicate<'tcx>