This strategy returns multiple deltas. It should return one delta (a list of of changes enclosed in one delta). Why? because deltas' changes are not visible among each other. Therefore, the if one delta is applied, the source in the rest of delta is never updated.
This strategy returns multiple deltas. It should return one delta (a list of of changes enclosed in one delta). Why? because deltas' changes are not visible among each other. Therefore, the if one delta is applied, the source in the rest of delta is never updated.