wp-content/themes/twentyfifteen/functions.php:351Registers widget area.
function twentyfifteen_widgets_init() { register_sidebar( array( 'name' => __( 'Widget Area', 'twentyfifteen' ), 'id' => 'sidebar-1', 'description' => __( 'Add widgets here to appear in your sidebar.', 'twentyfifteen' ), 'before_widget' => '<aside id="%1$s" class="widget %2$s">', 'after_widget' => '</aside>', 'before_title' => '<h2 class="widget-title">', 'after_title' => '</h2>', ) );}Introduced in Twenty Fifteen 1.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-content/themes/twentyfifteen/functions.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.