Usage: an implementation of this interface is supplied and you must use it as is. You should not reimplement it.
interface CATVolume
Interface representing a topological volume.
A volume is a topological cell which geometry
is a 3D-space. It is bounded by faces, edges and vertices.
A CATVolume is created with the CATBody.CreateCell or
CATBody.CreateVolume methods and deleted with the
CATICGMContainer.Remove method.
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