wp-includes/widgets.php:1897Enables the widgets block editor. This is hooked into 'after_setup_theme' so that the block editor is enabled by default but can be disabled by themes.
function wp_setup_widgets_block_editor() { add_theme_support( 'widgets-block-editor' );}Introduced in 5.8.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/widgets.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.