No, there's no discussion on that because the world has changed, but the IDPs were also present in 1951 when those legal concepts were drafted.
The refugee definition is really based on the fact that an individual is not able to avail himself or herself of the protection of his or her state. That's the definition, and therefore this person is at risk because there is no state to protect that person. The IDPs are still within the jurisdiction of their country and it's still the responsibility—that's a human rights framework—of this country to protect them.
Now the persecution, we acknowledge, can come both from state agents or non-state actors. When it's a non-state actor, it's still the responsibility of that state. We are speaking here about Central America, for example, providing the safety, the security and judicial remedies to people at risk of violation of their rights by those armed groups and so on.