title: How to let <f:facet> contain multiple components? It shows only the first
body: <p>I use <code>&lt;f:facet&gt;</code> to create a table header and I want a symbol beside it. However, it doesn't seem to work well. The symbol is not rendered.</p>
  
  <p>JSF:</p>
  
  <pre><code>&lt;h:column id="subject_column"&gt;
    &lt;f:facet name="header"&gt;
      &lt;h:commandLink value="Subject" id="sort_by_subjects"
                     action="#{xxx.sort}"&gt;
        &lt;f:param id="sortBySubject" name="sortBy" value="SUBJECT"/&gt;
      &lt;/h:commandLink&gt;
      &lt;span&gt;${isAscending}&lt;/span&gt;
    &lt;/f:facet&gt;
    &lt;h:outputText value="#{email.emailSubject}"/&gt;
  &lt;/h:column&gt;
  </code></pre>
  
  <p><code>${isAscending}</code> contains the arrow symbol <code>↑</code> and represents the order. I would like to show it beside <code>&lt;h:commandLink&gt;</code>.</p>