What level of abstraction is this for? Like the digraph example, that looks like it's re-implementing core parts of graphviz—is the idea that every clones and r

What level of abstraction is this for? Like the digraph example, that looks like it's re-implementing core parts of graphviz—is the idea that every clones and re-uses this implementation for their own digraphs? Because the implementation (".style" tab) looks quite low-level and laborious... https://penrose.cs.cmu.edu/try/?examples=graph-domain/textbook/sec1/fig5 https://penrose.cs.cmu.edu/try/?examples=graph-domain/textbo...