title: How to set MIME encoding in Julia?
body: <p>I am trying to call the following <code>show</code> function which has the signature: <code>function show(io::IO, ::MIME&quot;text/plain&quot;, holder::Int)</code>. What do I need to do with the 2nd argument such that I can call this function? I am unsure what <code>&quot;::MIME&quot;text/plain&quot;</code> is asking for.</p>