How to use the ioslib.device function in ioslib

})
				.on('exit', function () {
					// no need to stick around, exit
				})
				.on('error', function (err) {
					logger.error(err.message || err.toString());
					logger.log();
				});

		} else if (target === 'device') {
			// TODO: device

			var appName = this.tiapp.name + '.app',
				appPath = path.join(this.buildDir, 'build', 'iphone', 'build', 'Debug-iphoneos', appName);

			emitter = ioslib.device.install(this.deviceInfo.udid, appPath, this.tiapp.id)
				.on('installed', function (line) {
					logger['tio2-warn'](appName + ' installed, but cannot be launched automatically!!!');
				})
				.on('app-started', function (line) {
					logger['tio2-debug']('-- app-started');
				})
				.on('log', function (line) {
					line = line.replace(logLevelRegExp, '');
					if (line === self.tiTestStartMarker) {
						inTiMochaResult = true;
					} else if (inTiMochaResult && line === self.tiTestStopMarker) {
						emitter.removeListener('log', watch);
						emitter.removeListener('logFile', watch);
						try {
							self.results = tiMochaResults.length ? JSON.parse(tiMochaResults.join('\n').trim()) : {};
							next();

function (cb) {
			// add iOS args
			if (this.platform !== 'ios') { return cb(); }

			this.iosVersion && args.push('--ios-version', this.iosVersion);

			if (this.target !== 'device') {
				return cb();
			}

			// find us a device
			ioslib.device.detect(function (err, deviceResults) {
				if (!deviceResults.devices.length) {
					// no devices connected
					return done(new Error('No iOS devices connected'));
				}

				ioslib.certs.detect(function (err, certResults) {
					var certs = [];
					Object.keys(certResults.certs.keychains).forEach(function (keychain) {
						var types = certResults.certs.keychains[keychain];
						Object.keys(types).forEach(function (type) {
							certs = certs.concat(types[type]);
						});
					});

					if (!certs.length) {
						return cb(new Error('No iOS certificates'));