creates an abstract node from a boxlike

place ~orient nodes edges returns a concrete representation of the abstract directed graph composed by nodes linked by edges. The concrete representation is composed by the list of all the boxlikes of nodes placed by dot and by the list of paths representing the edges drawn by dot

• parameter orient

  specifies the orientation of the graph :

  • `TB top to bottom (default)
  • `LR left to right
  • `BT bottom to top
  • `RL right to left