error: Deref cannot be derived for enums. It is only applicable to structs with a single field.
  --> tests/inc/deref/compile_fail_enum.rs:11:1
   |
11 | / #[ allow( dead_code ) ]
12 | | #[ derive( derive_tools_meta::Deref ) ]
13 | | enum MyEnum
...  |
16 | |   Variant2( i32 ),
17 | | }
   | |_^
