code: function UInt8ArrayDeserializer(buffer, bufferOffset, arrayLen=null) {
    if (arrayLen === null || arrayLen < 0) {
      arrayLen = getArrayLen(buffer, bufferOffset);
    }
  
    const array = buffer.slice(bufferOffset[0], bufferOffset[0] + arrayLen);
    bufferOffset[0] += arrayLen;
    return array;
  }
docs: Specialized array deserialization for UInt8 Arrays
  We return the raw buffer when deserializing uint8 arrays because it's much faster