Lizzie, I do know and probably never will.

Keith, The relationship between black holes and empty voids is that as certain regions contract around areas of ultimate density and time stoppage, the surrounding areas of relative nothingness are relatively larger. It's easy to picture. It is trickier to measure.

Bill I will look into cosmic communities for ideas, but not for agreement.

I fully recognize my idea that "dark energy is an illusion" is a hypothesis.

This hypothesis can be proven wrong or right with the uses of the M telescope and the Keplar;

Looking far away with a universe mapping M scope we will be able to measure the rate of formation of black holes and compare it to rates relatively close today. IF they are significantly different rates then the relative time distortions can be calculated. By comparing a 3D map of the early universe to one 10 billion years older we could map the time distorting voids changing shapes over time. We could update distance measurements of using the type 1 a super nova brightness scale that may be incorrect due to relative time distortion. They may be closer or farther than we thought most likely at the same rate as the acceleration of the universe hypothesis assumptions.

Even the Keplar scope will help measure differing gravitational lensing of different regions of space. (the more lesning the more dense) Although considered relative smooth, the universe does have regions of much less density compared to regions that are more dense and seem to be attracted to an even greater density. (the great attractor, which may be an aspect of or clue to a nearby multiverse structure, or not, but it is immensely gravitational)

What would make these measurements perfectly simple would be a triangular measurement 4 or 5 billion light years apart.
But alas we are looking from one point, Earth.