pub unsafe extern "C" fn cuda_integer_key_expansion_64(
streams: CudaStreamsFFI,
expanded_keys: *mut CudaRadixCiphertextFFI,
key: *const CudaRadixCiphertextFFI,
mem_ptr: *mut i8,
bsks: *const *mut c_void,
ksks: *const *mut c_void,
)