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export const concatUint8Array = (    chunks: (Uint8Array | Int8Array)[],    byteLength?: number): Uint8Array => {
    byteLength = byteLength !== undefined ?        byteLength :        chunks.reduce<number>((prev, { byteLength }) => prev + byteLength, 0)        ;
    return chunks.reduce(        ({ out, n }, chunk) => {
            out.set(                chunk.slice(                    0,                    Math.min(chunk.byteLength, byteLength! - n)                ),                n            );
            return {                out,                "n": n + chunk.length            };
        },        { "out": new Uint8Array(byteLength), "n": 0 }    ).out        ;
}