The IO::All object is a proxy for IO::File, IO::Dir, IO::Socket,
IO::String, Tie::File, File::Spec, File::Path and File::ReadBackwards; as
well as all the DBM and MLDBM modules. You can use most of the methods
found in these classes and in IO::Handle (which they inherit from). IO::All
adds dozens of other helpful idiomatic methods including file stat and
manipulation functions.