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internal struct BytesSequence<D: RandomAccessCollection>: Sequence where D.Iterator.Element == UInt8, D.Index == Int {
    let chunkSize: D.Index
    let data: D
    func makeIterator() -> AnyIterator<D.SubSequence> {
        var offset = data.startIndex
        return AnyIterator {
            let end = Swift.min(self.chunkSize, self.data.count - offset)
            let result = self.data[offset..<offset + end]
            offset = offset.advanced(by: result.count)
            if !result.isEmpty {
                return result
            }
            return nil
        }
    }
}

valuePointer.deinitialize(count: 1)
valuePointer.deallocate()