/**
 * @constructor
 *
 * @param {string} family
 * @param {Object} descriptors
 */
var FontFaceObserver = function (family, descriptors) {};

/**
 * @param {string=} opt_text
 * @param {number=} opt_timeout
 *
 * @return {Promise.<FontFaceObserver>}
 */
FontFaceObserver.prototype.load = function (opt_text, opt_timeout) {};
