ps://crates.io/crates/futures">futures</a>,
  <a href="https://crates.io/crates/mio">mio</a>,
  <a href="https://crates.io/crates/tokio">tokio</a>, and
  <a href="https://crates.io/crates/smol">smol</a>.
</p>
<h2><code>async</code> syntax and blockers</h2>
<ul id="async-blockers">
  {{ macros::render_items(items=items.async_blockers) }}
</ul>
<h3>Future extensions</h3>
<ul id="async-extensions">
  {{ macros::render_items(items=items.async_extensions) }}
</ul>
<h2><code>async</code> ecosystem</h2>
<ul id="as