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  1. or download this
    package MyFlags;
    use constant FooFlag => 42;
    use constant BarFlag => 23;
    ...
    package MyFlyingMonkey;
    use MyFlags qw( FooFlag BarFlag );
    print BarFlag . "\n";
    
  2. or download this
    package Potato;
    use constant tuber => 1;
    
    package main;
    print Potato->tuber;