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  1. or download this
    sub QuickAndDirty { return SubSubroutine( shift, 3, shift, 'etc' ) }
    
    ...
        die "Expected 3 args" unless 3 == @_;
        my ( $arg1, $arg2, $arg3 ) = @_;
    }
    
  2. or download this
      DB<7> sub s1 { $_[0] = 1 }
    
    ...
    0  1
      DB<11> x $g
    0  1