* @since 1.0.0-beta.27 Call parent constructor.
	 *
	 * @return void
	 */
	public function __construct() {

		parent::__construct();

		$this->enrollments_controller = new LLMS_REST_Enrollments_Controller();
		$this->enrollments_controller->set_collection_params( $this->get_enrollments_collection_params() );

		$this->sections_controller = new LLMS_REST_Sections_Controller( '' );
		$this->sections_controller->set_collection_params( $this->get_course_content_collection_params() );

	}

	/**
	 * Register routes.
	 *
	 * @since 1.0.0-beta.1
	 *
	 * @return void
	 */
	public function register_routes() {

		parent::register_routes();

		register_rest_route(
			$this->namespace,
			'/' . $this->rest_base . '/(?P<id>[\d]+)/enrollments',
			array(
				'args'   => array(
					'id' => array(
						'description' => __( 'Unique Course Identifier. The WordPress Post ID', 'lifterlms' ),
						'type'        => 'integer',
					),
				),
				array(
					'methods'             => WP_REST_Server::READABLE,
					'callback'            => array( $this->enrollments_controller, 'get_items' ),
					'permission_callback' => array( $this->enrollments_controller, 'get_items_permissions_check' ),
					'args'                => $this->enrollments_controller->get_collection_params(),
				),
				'schema' => array( $this->enrollments_controller, 'get_public_item_schema' ),