wp-includes/theme.php:4388Given an element name, returns a class name.
$elementstringstringfunction wp_theme_get_element_class_name( $element ) { return WP_Theme_JSON::get_element_class_name( $element );}Introduced in 6.1.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/theme.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.