Fix VisiiblityInspector's use of cover VBL #4497
Merged
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Identify the Bug or Feature request
Improves on #3732
Description of the Change
The tool doesn't like
null
topology, but its cover VBL was being set tonull
. Instead we make sure it set the cover VBL to empty.Possible Drawbacks
None
Documentation Notes
N/A
Release Notes
N/A
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