Which loaded version the coordinates were read in: "exact" the stored one, "same-model" another version of its model, "other-model" another model it recorded or any; null with no model loaded (no camera or planes restored then)
Stored measurements that could not be drawn (a laser whose beams could not be cast, a point that is not one)
Recorded models of which no version is loaded
Stored objects of versions that are not loaded
Recorded models loaded at another version
The parts restored
What Viewpoints.restore did and could not do