vendor/symfony/console/Tests/Fixtures/input_definition_3.xml

<?xml version="1.0" encoding="UTF-8"?>
<definition>
  <arguments/>
  <options>
    <option name="--option_name" shortcut="-o" accept_value="0" is_value_required="0" is_multiple="0">
      <description></description>
    </option>
  </options>
</definition>