ame</span>
    <span class=identifier>ordered_non_unique</span><span class=special>&lt;
      </span><span class=identifier><b>key</b></span><span class=special><b>&lt;&amp;</b></span><span class=identifier><b>phonebook_entry</b></span><span class=special><b>::</b></span><span class=identifier><b>family_name</b></span><span class=special><b>,&amp;</b></span><span class=identifier><b>phonebook_entry</b></span><span class=special><b>::</b></span><span class=identifier><b>given_name</b></span><span class=speci