private function get_additional_fields( $location, $args = array() ) {

		/**
		 * Filter to add custom fields to a form programmatically.
		 *
		 * @since 3.0.0
		 * @since 5.0.0 Moved from deprecated function `LLMS_Person_Handler::get_available_fields()`.
		 *
		 * @param array[] $fields   Array of field array suitable to pass to `llms_form_field()`.
		 * @param string  $location Form location, one of: "checkout", "registration", or "account".
		 * @param array   $args     Additional arguments passed to the short-circuit filter.
		 */
		return apply_filters( 'lifterlms_get_person_fields', array(), $location, $args );

	}