href="Bytes.html#TYPEt"><code class="code"><span class="constructor">Bytes</span>.t</code></a> mutable sequences of bytes.
    OCaml 4 had various compiler flags and configuration options to support the
    transition period from mutable to immutable strings.
    Those options are no longer available, and strings are now always
    immutable.</p>

<p>The labeled version of this module can be used as described in the
    <a href="StdLabels.html"><code class="code"><span class="constructor">StdLabels</span></