COMP: Update SpatialObjects to correct const-ness #2680
Merged
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SpatialObjects can now return a const list of their children, and SpatialObjectWriter accepts a const object.
Furthermore, updated test...A spatial object point has a position in object space, but until it is added to a spatial object (which potentially exists in a hierarchy of objects with parent/child transforms) the point does not have a position in world space. So, the test has been updated to add a point to an object before asking for that point's world space position.