Learndash_DTO::only Learndash_DTO::only( string $keys ) Includes a property or multiple properties in the DTO. ContentsDescription Parameters Return Source Changelog Related @package Description # Parameters # $keys (string) (Required) Keys. Return # (static) Source # File: includes/dto/class-learndash-dto.php Changelog # Changelog Version Description 4.5.0 Introduced. Related # @package # LearnDash