wp-includes/pomo/streams.php:355PHP4 constructor.
$filename public function POMO_CachedIntFileReader( $filename ) { _deprecated_constructor( self::class, '5.4.0', static::class ); self::__construct( $filename ); }Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/pomo/streams.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.