wp-includes/theme.php:730Displays localized stylesheet link element.
function locale_stylesheet() { $stylesheet = get_locale_stylesheet_uri(); if ( empty( $stylesheet ) ) { return; } printf( '<link rel="stylesheet" href="%s" media="screen" />', $stylesheet );}Introduced in 2.1.0. 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.