ass methods to declare aspects of the UI. In particular, <code>opts</code> returns the <code>OptionParser</code> in play that you can use to declare global options. Unlike <code>OptionParser</code>&#39;s <code>on</code> method, Brut&#39;s does not require providing a block. Brut will store the runtime options in an object (see below).</p><div class="language-ruby vp-adaptive-theme"><button title="Copy Code" class="copy"></button><span class="lang">ruby</span><pre class="shiki shiki-themes github-light githu