fn impl_complex_enum_struct_variant_cls(
    enum_name: &Ident,
    variant: &PyClassEnumStructVariant<'_>,
    ctx: &Ctx,
) -> Result<(TokenStream, Vec<MethodAndMethodDef>, Vec<MethodAndSlotDef>)>fn impl_complex_enum_struct_variant_cls(
    enum_name: &Ident,
    variant: &PyClassEnumStructVariant<'_>,
    ctx: &Ctx,
) -> Result<(TokenStream, Vec<MethodAndMethodDef>, Vec<MethodAndSlotDef>)>