<p>In <a href="#l4">listing 4</a> we see the primary core interface
API declaration.</p>
<figure id="l4">  Figure can be code, table etc
 <legend>Listing 4. The primary core interface API declaration.</legend>
 <pre><code>interface PrimaryCore {
  boolean verifyDataLine();
  void sendData(in sequence<byte> data);
  void initSelfDestruct();
}</code></pre>
</figure>
<p>The API is designed to use UTF-8.</p>


<figure>
 <img src="bubbles-work.jpeg"
      alt="Bubbles, sitting in his office chair, works on his
           latest project intently.">
 <legend>Bubbles at work</legend>
</figure>