How does the doctrine of pratītyasamutpāda interact with Dhammapala's interpretation of nibbana?

The doctrine of [pratītyasamutpāda](https://en.wikipedia.org/wiki/Prat%C4%ABtyasamutp%C4%81da) states that: > **all dharmas (phenomena) arise in dependence upon other dharmas**: "if this exists, that exists; if this ceases to exist, that also ceases to exist". **The basic principle is that all things (dharmas, phenomena, principles) arise in dependence upon other things.** However, on the [Wikipedia page on Nirvana](https://en.wikipedia.org/wiki/Nirvana_(Buddhism)) , it is stated: > According to Dhammapala, **nibbana is an objective reality** which is the opposite of samsara. **Nibbana has its own nature (sabhava) which is unlike all conditioned phenomena.** From this, I'm curious to know the following inter-related ideas: a) Is all there is to reality these conditioned Dharma and if yes, where does Dhammapala's idea of nibbana fit into this if its a non-conditioned phenomena which an intrinsic essence/nature? b) In the view of Dhammapala, are all conditioned phenomena ultimately dependent on this Absolute and Objective Reality which has an intrinsic nature? Does nibbana originate anything itself or is it merely like a principle? Just as an idea, perhaps the doctrine of the Two Truths is related to this, with nibbana belonging or being identical to the Ultimate Truth.