error[E0599]: no method named `build` found for struct `GenericStructBuilder<false>` in the current scope
 --> tests/ui/reject/field_missing_required.rs:9:20
  |
3 | #[derive(Builder)]
  |          ------- method `build` not found for this struct
...
9 |     Struct::builder().build();
  |                       ^^^^^ method not found in `GenericStructBuilder<false>`
  |
  = note: the method was found for
          - `GenericStructBuilder<true>`