pod2usage(-exitstatus => 1, -verbose => 2, -input => 'docu.pod');
pod2usage(-exitstatus => 1, -verbose => 2, -input => $0);
pod2usage(-exitstatus => 1, -verbose => 2, -input => __FILE__);
pod2usage(-exitstatus => 1, -verbose => 2, -input => \*DATA);
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