ProgramNode(0...13)(
  [:a, :b],
  StatementsNode(0...13)(
    [CallNode(0...13)(
       ParenthesesNode(1...13)(
         StatementsNode(2...12)(
           [MultiWriteNode(2...12)(
              [LocalVariableWriteNode(2...3)(:a, 0, nil, (2...3), nil),
               LocalVariableWriteNode(5...6)(:b, 0, nil, (5...6), nil)],
              (7...8),
              CallNode(9...12)(
                nil,
                nil,
                (9...12),
                nil,
                nil,
                nil,
                nil,
                0,
                "foo"
              ),
              nil,
              nil
            )]
         ),
         (1...2),
         (12...13)
       ),
       nil,
       (0...1),
       nil,
       nil,
       nil,
       nil,
       0,
       "!"
     )]
  )
)
