359             struct AssertSrcIsImmutable<'a, T: ?::core::marker::Sized + $crate::Immutable>(&'a T);
361             struct AssertDstIsImmutable<'a, T: ?::core::marker::Sized + $crate::Immutable>(&'a T);
1114         unsafe impl $(<$($tyvar),*>)? $crate::Immutable for $name$(<$($tyvar),*>)?
1117                 $($tuple_field_ty: $crate::Immutable,)*
1121                 $($field_ty: $crate::Immutable,)*
1245         unsafe impl $crate::Immutable for $name
1248                 $field_ty: $crate::Immutable,
1264     #[derive(KnownLayout, Immutable, FromBytes, IntoBytes, PartialEq, Debug)]
1325     #[derive(FromBytes, IntoBytes, Immutable, PartialEq, Eq, Debug)]
1371                 T: IntoBytes + Immutable,  in test_transmute_ref()  argument
1372                 U: FromBytes + Immutable,  in test_transmute_ref()  argument
1701         fn assert_impls<T: FromBytes + IntoBytes + Immutable>() {}  in test_cryptocorrosion_derive_traits()  argument