p-down search to get the components in the collection that depend on the components given, including the
components given.</p><div class="fullcomment"><div class="comment cmt"><p>Use a top-down search to get the components in the collection that depend on the components given, including the
components given.</p></div><dl class="paramcmts block"><dt class="param">collection</dt><dd class="cmt"><p>Collection of components to refine.</p></dd><dt class="param">topLevel</dt><dd class="cmt"><p>Top-level component