Objective-S supports connections via → or "->". https://objective.st https://objective.st https://dl.acm.org/doi/10.1145/3689492.3690052 https://dl.acm.org/do

Objective-S supports connections via → or "->". https://objective.st https://objective.st https://dl.acm.org/doi/10.1145/3689492.3690052 https://dl.acm.org/doi/10.1145/3689492.3690052 It can generate GraphViz documents from connected components, but you could probably put in graphical objects.