We need to add minZ and depth (and maxZ) variables to Bounds and BoundingBox in order to support 3D.
            
- blocks
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                    JDK-8099881 Implement 3D bounds -           
- Resolved
 
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- is blocked by
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                    JDK-8099875 Add 3D transformations to the JavaFX API -           
- Closed
 
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