error[E0599]: no method named `cpu_slice_mut` found for struct `FrontBuffer<'a>` in the current scope
  --> tests/ui/scanout_front_write.rs:33:35
   |
33 |     let _slice: &mut [u8] = front.cpu_slice_mut();
   |                                   ^^^^^^^^^^^^^ method not found in `FrontBuffer<'_>`
