message: build(aio): render ancestor members in directives
  See `CheckBoxRequiredValidator` for an example.
diff: <a href="#annotations">@{$ decorator.name $}{$ params.paramList(decorator.arguments) $}</a>{% endfor %}
  class {$ doc.name $}{$ doc.typeParams | escape $}{$ memberHelper.renderHeritage(doc) $} {
  {%- if doc.statics.length %}{% for member in doc.statics %}{% if not member.internal %}
  - <a class="code-anchor" href="#{$ member.anchor $}">{$ memberHelper.renderMember(member, 1) $}</a>{% endif %}{% endfor %}{% endif %}
  -{%- if doc.members.length %}{% for member in doc.members %}{% if not member.internal %}
  - <a class="code-anchor" href="#{$ member.anchor $}">{$ memberHelper.renderMember(member, 1) $}</a>{% endif %}{% endfor %}{% endif %}
  + <a class="code-anchor" href="#{$ member.anchor $}">{$ memberHelper.renderMember(member, 1) $}</a>{% endif %}{% endfor %}{% endif -%}
  +{$ memberHelper.renderMembers(doc) $}
  }
  </code-example>
  </section>
  