wp-admin/includes/class-wp-importer.php:222Bumps up the request timeout for http requests.
$valintint public function bump_request_timeout( $val ) { return 60; }Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-admin/includes/class-wp-importer.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.