# normal mode, @ISA = qw(Gatherer::Blue)
  use StoneGatherer;

##</code><code>##

  # red mode, @ISA = qw(Gatherer::Red)
  use StoneGatherer qw(red);

##</code><code>##

  use Test::More tests => 42;

##</code><code>##

  package Item;

  sub import {
    push @{caller().'::ISA'}, __PACKAGE__;
  }