Dune.Allowlist.fun_status

You're seeing just the callback fun_status, go back to Dune.Allowlist module for more information.

fun_status(module, atom, non_neg_integer)

fun_status(module(), atom(), non_neg_integer()) :: status()

Returns the trust status of a function or macro, specified as a module, fun_name and arity (mfa):

:allowed if can be safely use
:restricted if its usage should be forbidden
a {:shimmed, module, function_name} if the function call should be replaced with an alternative implementation