ncept is deprecated and will be removed in a future version. <span class="emphasis"><em>Actions
          Required</em></span>: Do not rely on the <span class="emphasis"><em>Fields</em></span> concept.
        </li>
<li class="listitem">
          <code class="computeroutput"><span class="identifier">handler_ptr</span></code> is deprecated.
          <span class="emphasis"><em>Actions Required</em></span>: Use <code class="computeroutput"><span class="identifier">stable_async_base</span></code>
          an