# ByteSeq
<span class="source-link">[[Source]](src/builtin/std_stream.md#L1)</span>
```pony
type ByteSeq is
  (String val | Array[U8 val] val)
```

#### Type Alias For

* ([String](builtin-String.md) val | [Array](builtin-Array.md)\[[U8](builtin-U8.md) val\] val)

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