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  1. or download this
    package Foo;
    use Exporter;
    our @ISA = ( 'Exporter' );
    
  2. or download this
    package Foo;
    use base 'Exporter';
    
  3. or download this
    # file Foo.pm
    
    ...
    % perl test.pl
    about to test sysread
    this is not the real thing