
  [;1m-spec is_builtin(Module, Function, Arity) -> boolean()[0m
  [;1m                    when[0m
  [;1m                        Module :: module(),[0m
  [;1m                        Function :: atom(),[0m
  [;1m                        Arity :: arity().[0m

  This BIF is useful for builders of cross-reference tools.

  Returns [;;4mtrue[0m if [;;4mModule:Function/Arity[0m is a BIF implemented in
  C, otherwise [;;4mfalse[0m.
