graphviz:
  task_def:
    shape: circle
    style: filled
    fillcolor: black
    fixed: true
    width: 0.1
  task_call_st:
    shape: box
  while_st:
    shape: diamond
  if_st:
    shape: diamond
  case_st:
    shape: diamond
  par_st:
    shape: box
    height: 0.1
    style: filled
    fillcolor: black