wp-includes/l10n.php:1481Returns the Translations instance for a text domain.
$domainstringTranslations|NOOP_Translationsfunction get_translations_for_domain( $domain ) { global $l10n; if ( isset( $l10n[ $domain ] ) || ( _load_textdomain_just_in_time( $domain ) && isset( $l10n[ $domain ] ) ) ) { return $l10n[ $domain ]; } static $noop_translations = null; if ( null === $noop_translations ) { $noop_translations = new NOOP_Translations(); } $l10n[ $domain ] = &$noop_translations; return $noop_translations;}Introduced in 2.8.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/l10n.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.