wp-admin/includes/class-bulk-theme-upgrader-skin.php:37Sets up the strings used in the update process.
public function add_strings() { parent::add_strings(); /* translators: 1: Theme name, 2: Number of the theme, 3: Total number of themes being updated. */ $this->upgrader->strings['skin_before_update_header'] = __( 'Updating Theme %1$s (%2$d/%3$d)' ); }Introduced in 3.0.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-admin/includes/class-bulk-theme-upgrader-skin.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.