<blockquote>
<p>This is not extensible at all, so not a good fit for a plugin API</p>
</blockquote>

<p>Then stick a <code>...</code> as the last parameter, infinitely extensible :)</p>

<p>An actual sensible good trick used by Linux system calls (among others) is to always have a <code>flags</code> parameter as the last thing, then you can add options for stuff like <code>prefix</code> or whatever else could be represented as a bitmask.</p>

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