wp-includes/block-supports/states.php:196Adds a style fragment to a selector-keyed state style group.
$groupsarray$selectorstring|null$stylearrayfunction wp_add_state_style_group( &$groups, $selector, $style ) { $key = is_string( $selector ) ? $selector : ''; if ( ! isset( $groups[ $key ] ) ) { $groups[ $key ] = array( 'selector' => $selector, 'style' => array(), ); } $groups[ $key ]['style'] = array_replace_recursive( $groups[ $key ]['style'], $style );}Introduced in 7.1.0.
Signature, return type and hooks compared across 1 parsed release.
src/wp-includes/block-supports/states.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.