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  1. or download this
    package Hunting::Snark;
    use Bellman qw(foo bar);
    ...
    package Boojum;
    
    foo(); # is an undefined subroutine. There is no &Boojum::foo
    
  2. or download this
    package Hunting::Snark;
    use Bellman qw(foo bar);
    use Boojum qw(baz etc);
    foo(); # is an undefined subroutine. There is no &Boojum::foo