Repo for php-barryvdh-laravel-dompdf can be found here: https://salsa.debian.org/php-team/pear/php-barryvdh-laravel-debugbar
Hint: You need a more actual version of php-dompdf and some other dependent packages, s.a. https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=567928#45 --