public PlainChangesLog read(ObjectReader in) throws UnknownClassIdException, IOException
{
int key;
if ((key = in.readInt()) != SerializationConstants.PLAIN_CHANGES_LOG_IMPL)
{
throw new UnknownClassIdException("There is unexpected class [" + key + "]");
}
int eventType = in.readInt();
String sessionId = in.readString();