* stackoverflow.com/questions/46913744/wordpress-child-theme-of-a-child-theme
* neliosoftware.com/blog/grandchild-theme-customizing-child-themes/?nab=0&utm_referrer=https%3A%2F%2Fneliosoftware.com%2Fblog%2Fgrandchild-theme-customizing-child-themes%2F
* www.wp-code.com/wordpress-snippets/wordpress-grandchildren-themes/
* docs.appthemes.com/tutorials/creating-grandchild-themes/
debugging mit Sentry
Lightboxes
Strobisten-Ausrüstung bei A*****n
* https://www.amazon.de/Neewer-Fotoschirm-Stativkopf-Blitzschuh-Drehgelenk/dp/B01ABFSAPU?th=1
* https://www.amazon.de/Neewer-kontinuierliche-Silber-Schirm-Portr%C3%A4tfotografie-Videoaufnahme/dp/B01JRYJB7M
* https://www.amazon.de/Neewer-drei-Foto-Studio-Schirme/dp/B01DJ11S6G
* https://www.amazon.de/Neewer-Blitz-Typ-Halterung-Hot-Schuh/dp/B004YNF3DI
* https://www.amazon.de/Neewer-Professionelle-Universal-Kamerablitz-Stativhalterung/dp/B06Y5L79K6
* https://www.amazon.de/H%C3%B6hestellbare-Lampenstativ-Fotostudio-Produktfotografie-Videoaufnahme/dp/B00WO4M0OY
* strobist.blogspot.com/2016/07/lighting-102-side-effects-lets-jump-off.html