the core type of <code>T</code> is called <code>bytestring</code>.
</p>

<p>
Examples of interfaces with <code>bytestring</code> core types:
</p>

<pre>
interface{ int }                          // int (same as ordinary core type)
interface{ []byte | string }              // bytestring
interface{ ~[]byte | myString }           // bytestring
</pre>

<p>