Decision state size for disjoint lists is always zero.

[alexzucca90]

This should be different than 0.

from dwave.optimization.model import Model
model = Model()
destinations, routes = model.disjoint_lists(10, 4)
model.decision_state_size()
>>> 0

[arcondello]

No, because it's instead reported by the DisjointList (via inheritance from ArraySymbol. And, due to the way that it's stored under the hood that count is accurate.

It's an implementation detail that the state is managed by DisjointLists rather than the successors.