function readPlainByteArray(reader, count) {
  const values = new Array(count)
  for (let i = 0; i < count; i++) {
    const length = reader.view.getUint32(reader.offset, true)
    reader.offset += 4
    values[i] = new Uint8Array(reader.view.buffer, reader.view.byteOffset + reader.offset, length)
    reader.offset += length
  }
  return values
}
Read `count` byte array values.

@param {DataReader} reader
@param {number} count
@returns {Uint8Array[]}