fn missing_items_must_implement_one_of_err(
tcx: TyCtxt<'_>,
impl_def_id: LocalDefId,
missing_items: impl Iterator<Item = Symbol>,
annotation_span: Option<Span>,
) -> ErrorGuaranteedfn missing_items_must_implement_one_of_err(
tcx: TyCtxt<'_>,
impl_def_id: LocalDefId,
missing_items: impl Iterator<Item = Symbol>,
annotation_span: Option<Span>,
) -> ErrorGuaranteed