fileprivate struct FfiConverterData: FfiConverterRustBuffer {
    typealias SwiftType = Data

    public static func read(from buf: inout (data: Data, offset: Data.Index)) throws -> Data {
        let len: Int32 = try readInt(&buf)
        return Data(try readBytes(&buf, count: Int(len)))
    }

    public static func write(_ value: Data, into buf: inout [UInt8]) {
        let len = Int32(value.count)
        writeInt(&buf, len)
        writeBytes(&buf, value)
    }
}