type attribute = [ | `Color of string |
| `Shape of string |
| `Weight of int |
| `Style of string |
| `Label of string |
| `Id of string |
| `Other of string * string |
]Dot attributes for nodes
val mk_id : ('a, Buffer.t, unit, attribute) Pervasives.format4 ‑> 'aUsing a formatter string, build an ID.
val mk_label : ('a, Buffer.t, unit, attribute) Pervasives.format4 ‑> 'aUsing a formatter string, build a label.
val print_to_file : string ‑> graph ‑> unitprint_to_file filename g prints g into a file whose name
is filename.