@eagleoutice/flowr - v2.13.14
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    S7SyntheticFunArgSuffix: "-s7-new-generic-fun-arg" = '-s7-new-generic-fun-arg'

    Node-id suffix of the fun = function(...) S7_dispatch() argument flowR synthesizes for S7 calls that do not carry one (new_class, new_generic, ...). It stands for no argument in the source, so consumers that reason about how the code calls a function (e.g. matching a call against a package's signature history) must skip it.