<https://forum.affinity.serif.com/index.php?/topic/64651-how-to-have-a-transparent-stroke/#comment-336200>
<http://schema.org/text>
"Group this object, and Blend mode set to Erase.\n "
<https://forum.affinity.serif.com/index.php?/topic/64651-how-to-have-a-transparent-stroke/#comment-335894>