xdebug/blog/vendor/symfony/console/Tests/Fixtures/input_definition_2.xml

<?xml version="1.0" encoding="UTF-8"?>
<definition>
  <arguments>
    <argument name="argument_name" is_required="1" is_array="0">
      <description></description>
      <defaults/>
    </argument>
  </arguments>
  <options/>
</definition>