Function create_gpuarray 

pub fn create_gpuarray<T, S, D>(
    array: &ArrayBase<S, D>,
    manager: &CrossDeviceManager,
) -> CoreResult<DeviceArray<T, D>>
where
    T: GpuDataType,
    S: RawData<Elem = T> + Data,
    D: Dimension,

Create a device array on the GPU