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  1. or download this
    #!/usr/bin/perl -wl
    use strict;
    ...
    
    __END__
    in base via derived got 42
    
  2. or download this
      $pack->${\qq{${foo}nc}}->(42);
    
  3. or download this
    #!/usr/bin/perl
    use strict;
    ...
    no strict 'refs';
    main->${\1}->(42);    # 1() called with args: main
                          # 1() called with args: 42