lightweight subset of Exporter

 Exporter::Lite is an alternative to Exporter, intended to provide a
 lightweight subset of the most commonly-used functionality. It supports
 import(), @EXPORT and @EXPORT_OK and not a whole lot else.
 .
 Exporter::Lite simply exports its import() function into your namespace.
 This might be called a "mix-in" or a "role".
 .
 When Exporter::Lite was written, if you wanted to use Exporter you had to
 write something like this:
 .
  use Exporter;
  our @ISA = qw/ Exporter /;
 .
 Exporter::Lite saved you from writing that second line.
 But since before 2010 you've been able to write:
 .
  use Exporter qw/ import /;
 .
 which imports the import function into your namespace from Exporter.
 .
 As a result, it is recommended to use Exporter now,
 as it's a core module (shipped with Perl).