in serialization/src/main/java/com/twitter/serial/stream/legacy/LegacySerializerInput.java [98:107]
public void readNull() throws IOException {
try {
final Object o = mInput.readObject();
if (o != null) {
throw new SerializationException("Expected null object but found " + o);
}
} catch (ClassNotFoundException e) {
throw new SerializationException("Expected null object but found unclassified object", e);
}
}