- system_update_1000 in modules/
system/ system.install - Enable entity module.
- system_update_1009 in modules/
system/ system.install - Enable Admin Menu module.
- system_update_1025 in modules/
system/ system.install - Convert block positioning and configuration to the default layout.
- system_update_1032 in modules/
system/ system.install - Enable config module.
- update_fix_requirements in includes/
update.inc - Perform Drupal 7.x to Backdrop 1.x updates that are required for update.php to function properly.
- update_prepare_language in includes/
update.inc - Prepare Backdrop language changes for the bootstrap if needed.