code: function (buffer1, buffer2) {
      var combinedBuffer = new Uint8Array(buffer1.byteLength + buffer2.byteLength);
      combinedBuffer.set(new Uint8Array(buffer1), 0);
      combinedBuffer.set(new Uint8Array(buffer2), buffer1.byteLength);
      return combinedBuffer;
    }
docs: /*
  var FlatePredictors = {
  None: 1,
  TIFF: 2,
  PNG_None: 10,
  PNG_Sub: 11,
  PNG_Up: 12,
  PNG_Average: 13,
  PNG_Paeth: 14,
  PNG_Optimum: 15
  };