pub fn compress_worker_pool<Alloc: BrotliAlloc + Send + 'static, SliceW: SliceWrapper<u8> + Send + 'static + Sync>(
    params: &BrotliEncoderParams,
    owned_input: &mut Owned<SliceW>,
    output: &mut [u8],
    alloc_per_thread: &mut [SendAlloc<CompressionThreadResult<Alloc>, UnionHasher<Alloc>, Alloc, <SingleThreadedSpawner as BatchSpawnable<CompressionThreadResult<Alloc>, UnionHasher<Alloc>, Alloc, SliceW>>::JoinHandle>],
    _worker_pool: &mut WorkerPool<CompressionThreadResult<Alloc>, UnionHasher<Alloc>, Alloc, (SliceW, BrotliEncoderParams)>
) -> Result<usize, BrotliEncoderThreadError> where
    <Alloc as Allocator<u8>>::AllocatedMemory: Send,
    <Alloc as Allocator<u16>>::AllocatedMemory: Send,
    <Alloc as Allocator<u32>>::AllocatedMemory: Send