可展开项

<ResponseField name="user" type="User Object">
  <Expandable title="properties">
    <ResponseField name="full_name" type="string">
      用户的全名
    </ResponseField>

    <ResponseField name="is_over_21" type="boolean">
      用户是否已满 21 岁
    </ResponseField>
  </Expandable>
</ResponseField>