wp-includes/class-wp-theme.php:1995Gets block pattern cache.
array|false private function get_pattern_cache() { if ( ! $this->exists() ) { return false; } $pattern_data = get_site_transient( 'wp_theme_files_patterns-' . $this->cache_hash ); if ( is_array( $pattern_data ) && $pattern_data['version'] === $this->get( 'Version' ) ) { return $pattern_data['patterns']; } return false; }Introduced in 6.4.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/class-wp-theme.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.