CpuBufferPool array allocator

[penguin42]

Hi,
I've got a:
buffer::device_local::DeviceLocalBuffer::<[u8]>::array(vdevice.clone(), voxelsizevoxelsizevoxelsize,...

I'd like to dump, and I was hoping to use a CpuBufferPool for that, but it seems to be missing an ::array() allocator, it looks like it'll only take a fixed type for allocations, for example:

174 | let cpubuf = buffer::cpu_pool::CpuBufferPool::<[u8]>::download(self.vdevice.clone());
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ function or associated item not found in bulbvulk::vulkano::buffer::CpuBufferPool<[u8]>
|
= note: the method download exists but the following trait bounds were not satisfied:
[u8] : std::marker::Sized

error[E0277]: the trait bound [u8]: std::marker::Sized is not satisfied

I think it would be good to be able to allocate a CpuBufferPool in the same way that DeviceLocalBuffer lets you.
(Actually an even nicer thing would be to be able to pass a reference to my DeviceLocalBuffer and to create a CpuBufferPool of exactly the right size/type)
I guess I'll use a CpuAccessibleBuffer but that has the scary warning it might disappear.