wp-includes/class-wp-theme-json.php:2554Returns the appropriate selector for a block support feature's preset CSS variables.
$feature_selectorsarray$feature_keystring$default_selectorstringstring private static function get_feature_selector( array $feature_selectors, string $feature_key, string $default_selector ): string { if ( ! isset( $feature_selectors[ $feature_key ] ) ) { return $default_selector; } $feature = $feature_selectors[ $feature_key ]; if ( is_string( $feature ) ) { return $feature; } if ( isset( $feature['root'] ) && is_string( $feature['root'] ) ) { return $feature['root']; } return $default_selector; }Introduced in 7.1.0.
Signature, return type and hooks compared across 1 parsed release.
src/wp-includes/class-wp-theme-json.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.