docs: public static boolean isValidDeviceTokenForVariant(final String deviceToken, final VariantType type) {
          switch (type) {
              case IOS:
                  return IOS_DEVICE_TOKEN.matcher(deviceToken).matches();
              case ANDROID:
                  return ANDROID_DEVICE_TOKEN.matcher(deviceToken).matches();
              case WINDOWS_WNS:
                  return WINDOWS_DEVICE_TOKEN.matcher(deviceToken).matches();
          }
          return false;
      }