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  1. or download this
            print;
    
  2. or download this
        package Foo;
        use OI qw(oi);
    ...
            my  => [ qw ($foo $bar)],
            our => [ qw ($pkg_var1 $pkg_var2 ) ],
        );
    
  3. or download this
        package Foo;
        use strict;
    ...
            # outside in code here
    
        };
    
  4. or download this
        package Foo;
        use OI qw(oi);
    ...
        
        my $sub = oi(in  => 'example.html')
        $sub->('page title', 'header line');
    
  5. or download this
        package Foo;
        use OI qw(AUTOLOAD oi);
        use strict;
    
        example('page title', 'header line');