pub fn fold_trait_use<'new, 'src, F: Fold<'src> + ?Sized>(
folder: &mut F,
arena: &'new Bump,
trait_use: &TraitUseDecl<'_, 'src>,
) -> TraitUseDecl<'new, 'src>pub fn fold_trait_use<'new, 'src, F: Fold<'src> + ?Sized>(
folder: &mut F,
arena: &'new Bump,
trait_use: &TraitUseDecl<'_, 'src>,
) -> TraitUseDecl<'new, 'src>