DM Object: 1 MPI processes
  type: network
  NSubnets: 2; NEdges: 6; NVertices: 7; NSharedVertices: 1.
  [0] nEdges: 6; nVertices: 8; nSharedVertices: 1
     Subnet 0: nEdges 3, nVertices(include shared vertices) 4
       edge 0: 0 ----> 2
       edge 1: 2 ----> 1
       edge 2: 1 ----> 3
     Subnet 1: nEdges 3, nVertices(include shared vertices) 4
       edge 3: 0 ----> 6
       edge 4: 6 ----> 5
       edge 5: 5 ----> 4
     SharedVertices:
       svtx 0: global index 0, subnet[0].0 ---->
                                           ----> subnet[1].0
Vec Object: 1 MPI processes
  type: seq
  Vertex 0:
    1.
    2.
    2.
  Vertex 1:
    0.
  Vertex 2:
    0.
  Vertex 3:
    0.
  Vertex 4:
    0.
    0.
  Vertex 5:
    0.
    0.
  Vertex 6:
    0.
    0.
