public function set_columns() {
		return array(
			'id'       => array(
				'title' => __( 'ID', 'lifterlms' ),
			),
			'name'     => array(
				'title' => __( 'Name', 'lifterlms' ),
			),
			'status'   => array(
				'title' => __( 'Status', 'lifterlms' ),
			),
			'enrolled' => array(
				'title' => __( 'Enrolled', 'lifterlms' ),
			),
		);
	}