Inspection functions on objects doesn't receive the inspect object (docs)
Did not found where that method is called, but I did tested on v17.1.0 and it just receives 2 parameters:
> util.inspect(box);
Uncaught TypeError: inspect is not a function
at Box.[nodejs.util.inspect.custom] (REPL22:17:19)
at formatValue (node:internal/util/inspect:763:19)
at Object.inspect (node:internal/util/inspect:340:10)
fixing commit message, following the guidelines...