Hardcaml.GraphWrite circuit as graph.
val write_dot_rank : Stdio.Out_channel.t -> Circuit.t -> Base.unitval write_gdl : 
  ?names:Base.bool ->
  ?widths:Base.bool ->
  ?consts:Base.bool ->
  ?clocks:Base.bool ->
  Stdio.Out_channel.t ->
  Circuit.t ->
  Base.unitwrite a GDL (graph description language) file of the given circuit
val aisee3 : 
  ?args:Base.string ->
  ?names:Base.bool ->
  ?widths:Base.bool ->
  ?consts:Base.bool ->
  ?clocks:Base.bool ->
  Circuit.t ->
  Base.unitlaunch aisee3 to visualize the given circuit