1 0 GfsPoisson GfsBox GfsGEdge {} {
  Refine 3
  ApproxProjectionParams { nitermax = 1000 minlevel = 1 tolerance = 1e-30 }
  Solid dumbell.gts
  Init {} { Div = y }
  OutputProjectionStats { istep = 1 } stdout
}
GfsBox {}