[Maria-developers] extended keys

MySQL 5.6.9 changed how the number of key parts are measured. They replaced one simple counter (key_parts) with four counters. Glancing at the code, i assume that this was done to support extended keys. If so, the mariadb implementation of extended keys is a lot simpler. We have to maintain the tokudb storage engine on both mysql and mariadb. Is the mariadb design going to change to match the 5.6 implementation, or are the designs now separate? Thanks Rich Prohaska