which maybe used by a <a href="../../../com/facebook/rendercore/extensions/RenderCoreExtension.html" title="class in com.facebook.rendercore.extensions"><code>RenderCoreExtension</code></a>. This allow
 both <a href="../../../com/facebook/rendercore/RootHost.html" title="interface in com.facebook.rendercore"><code>RootHost</code></a> and <a href="../../../com/facebook/rendercore/RenderTreeHost.html" title="interface in com.facebook.rendercore"><code>RenderTreeHost</code></a> remain distinct while sharing AP