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

  Returns [;;4mtrue[0m if the module [;;4mModule[0m is current and contains an
  exported function [;;4mFunction/Arity[0m, or if there is a BIF (a
  built-in function implemented in C) with the specified name,
  otherwise returns [;;4mfalse[0m.
