Creating a 2-dimensional structured simplex mesh of 2x2x2 in memory and creating a DM object.
Generate the MOAB mesh hierarchy with 2 levels.
Level 0
DM Object: Coarse Mesh 1 MPI process
  type: moab
  Coarse Mesh in 2 dimensions:
    Sizes: cells=8, vertices=9, blocks=1
    Boundary trace:
      cells=8, faces=8, vertices=8
    Fields: 1 components
      [0] - DEFAULT
Level 1
DM Object: 1 MPI process
  type: moab
    Sizes: cells=32, vertices=25, blocks=1
    Boundary trace:
      cells=14, faces=16, vertices=16
    Fields: 1 components
      [0] - DEFAULT
Level 2
DM Object: 1 MPI process
  type: moab
    Sizes: cells=128, vertices=81, blocks=1
    Boundary trace:
      cells=30, faces=32, vertices=32
    Fields: 1 components
      [0] - DEFAULT