private static int getIVRecordSize(byte[] iv) {
      return VERSION_FIELD_SIZE_IN_BYTES + IV_SIZE_FIELD_IN_BYTES + iv.length;
    }
Returns the IV record size for the given iv
@param iv the iv for which IV record size is requested
@return the size of the IV record size for the given iv
ambry-router/src/main/java/com/github/ambry/router/GCMCryptoService.java