[Paraview] Unstructured Grids with Zones

[Terry Jordan]

I am attempting to write a native paraview reader for open foam.  OpenFoam has multiple zones/regions.  They have an internal mesh, boundary meshs(consisting of faces), and face/point/cellzones  (made up of subsets of the mesh).  so I need to create an unstructured grid that has regions/zones, would be best if each region could be toggled on and off, so the user could view all the regions or some of the regions...etc.  could someone point me in the direction of the class I should be using to do this?Thanks in advance.
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