ProgramNode(0...13)(
  [],
  StatementsNode(0...13)(
    [ArrayNode(0...13)(
       [InterpolatedSymbolNode(3...7)(
          nil,
          [EmbeddedStatementsNode(3...7)(
             (3...5),
             StatementsNode(5...6)(
               [CallNode(5...6)(nil, nil, (5...6), nil, nil, nil, nil, 0, "a")]
             ),
             (6...7)
           )],
          nil
        ),
        InterpolatedSymbolNode(8...12)(
          nil,
          [EmbeddedStatementsNode(8...12)(
             (8...10),
             StatementsNode(10...11)(
               [CallNode(10...11)(
                  nil,
                  nil,
                  (10...11),
                  nil,
                  nil,
                  nil,
                  nil,
                  0,
                  "b"
                )]
             ),
             (11...12)
           )],
          nil
        )],
       (0...3),
       (12...13)
     )]
  )
)
