code: function (deviceHandle, functionName, errorCallback) {
  			var device = winble.deviceManager.deviceList[deviceHandle];
  			if (device == null) {
  				var msg = "Could not find the requested device handle '" + deviceHandle + "'";
  				winble.logger.logError(functionName, msg);
  				errorCallback(winble.DEVICE_NOT_FOUND);
  			}
  			return (device);
  		}
docs: Called internally to look up a previously discovered BLE device by handle. Look up the requested device and complain if we can't find it.