[ [ SubMesh_1, SubMesh_3, SubMesh_2 ] ] = Mesh_1.GetMeshOrder()
isDone = Mesh_1.Compute()
print("Nb elements at initial order of sub-meshes:", Mesh_1.NbElements())
[ [ SubMesh_1, SubMesh_3, SubMesh_2 ] ] = Mesh_1.GetMeshOrder()
isDone = Mesh_1.Compute()
print("Nb elements at initial order of sub-meshes:", Mesh_1.NbElements())