 <button class="toggle" id="theme-button" title="Toggle between light and dark mode" aria-label="Light and dark mode toggle">
    <span id="dark-theme-button" class="material-symbols-outlined" aria-hidden="true">
      dark_mode
    </span>
    <span id="light-theme-button" class="material-symbols-outlined" aria-hidden="true">
      light_mode
    </span>
  </button>
</header>
<main>
<div
    id="dartdoc-main-content"
    class="main-content"
    data-above-sidebar=""
    data-below-sidebar="base32&#47;base