Issue #1987424 by rteijeiro, oshelach, a-fro, JeroenT, joelpittet, Cottser, IshaDakota, InternetDevels, TommyK, Sutharsan, robmc, mark.labrecque, lokapujya, Gaelan, drupalninja99, Carolyn, jenlampton, longwave: Seven.theme - Convert theme_ functions to Twig.