wp-includes/template.php:413Retrieves path of front page template in current or parent template.
stringfunction get_front_page_template() { $templates = array( 'front-page.php' ); return get_query_template( 'frontpage', $templates );}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/template.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.