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contains_illegal_impl_trait_in_trait

rustc_trait_selection::traits::dyn_compatibility

Function contains_illegal_impl_trait_in_trait 

Source 
fn contains_illegal_impl_trait_in_trait<'tcx>(
    tcx: TyCtxt<'tcx>,
    fn_def_id: DefId,
    ty: Binder<'tcx, Ty<'tcx>>,
) -> Option<MethodViolation>