wp-includes/nav-menu.php:165Retrieves all registered navigation menu locations and the menus assigned to them.
int[]function get_nav_menu_locations() { $locations = get_theme_mod( 'nav_menu_locations' ); return ( is_array( $locations ) ) ? $locations : array();}Introduced in 3.0.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/nav-menu.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.