public function get_sections( $return = 'sections' ) {

		$q = new WP_Query(
			array(
				'meta_key'       => '_llms_order',
				'meta_query'     => array(
					array(
						'key'   => '_llms_parent_course',
						'value' => $this->id,
					),
				),
				'order'          => 'ASC',
				'orderby'        => 'meta_value_num',
				'post_type'      => 'section',
				'posts_per_page' => 500,
			)
		);

		if ( 'ids' === $return ) {
			$r = wp_list_pluck( $q->posts, 'ID' );
		} elseif ( 'posts' === $return ) {
			$r = $q->posts;
		} else {
			$r = array();
			foreach ( $q->posts as $p ) {
				$r[] = new LLMS_Section( $p );
			}
		}

		return $r;
	}