def METHOD_NAME():
    imprt = smtk.io.vtk.ImportVTKData()
    ug = make_MixedVolUGrid()
    meshResource = smtk.mesh.Resource.create()
    imprt(ug, meshResource)
    if meshResource == None or not meshResource.isValid():
        raise RuntimeError("resource should be valid")
    if meshResource.numberOfMeshes() != 1:
        raise RuntimeError("resource should only have a single mesh")
    if meshResource.cells().size() != ug.GetNumberOfCells():
        raise RuntimeError(
            "resource and unsigned grid should have the same number of cells")
    meshes = meshResource.meshes(smtk.mesh.Dims3)
    if meshes.size() != 1:
        raise RuntimeError("wrong number of meshes")
    if meshes.cells() != meshResource.cells():
        raise RuntimeError("cell sets should match")
    exprt = smtk.io.vtk.ExportVTKData()
    ug2 = vtk.vtkUnstructuredGrid()
    exprt(meshes, ug2)
    test_same_datasets(ug, ug2)