Function rustc_trait_selection::solve::deeply_normalize_with_skipped_universes

pub fn deeply_normalize_with_skipped_universes<'tcx, T: TypeFoldable<TyCtxt<'tcx>>>(
    at: At<'_, 'tcx>,
    value: T,
    universes: Vec<Option<UniverseIndex>>
) -> Result<T, Vec<FulfillmentError<'tcx>>>

Deeply normalize all aliases in value. This does not handle inference and expects its input to be already fully resolved.

Additionally takes a list of universes which represents the binders which have been entered before passing value to the function. This is currently needed for normalize_erasing_regions, which skips binders as it walks through a type.